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213206880782160 = 2437517674912179
BaseRepresentation
bin110000011110100100011000…
…011001001000011101010000
31000221220101020002211020000000
4300132210120121020131100
5210421140142440012120
62033241515555130000
762623455155606466
oct6036443031103520
91027811202736000
10213206880782160
1161a30591a00771
121bab4b08ba3900
1391c742695a4a5
143a913a78d2836
15199b000cb5990
hexc1e918648750

213206880782160 has 1280 divisors, whose sum is σ = 800921223475200. Its totient is φ = 52580580433920.

The previous prime is 213206880782141. The next prime is 213206880782197. The reversal of 213206880782160 is 61287088602312.

213206880782160 is a `hidden beast` number, since 2 + 1 + 320 + 6 + 8 + 80 + 7 + 82 + 160 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 213206880782097 and 213206880782106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 97846203951 + ... + 97846206129.

It is an arithmetic number, because the mean of its divisors is an integer number (625719705840).

Almost surely, 2213206880782160 is an apocalyptic number.

213206880782160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213206880782160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400460611737600).

213206880782160 is an abundant number, since it is smaller than the sum of its proper divisors (587714342693040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213206880782160 is a wasteful number, since it uses less digits than its factorization.

213206880782160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 2764 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 213206880782160 in words is "two hundred thirteen trillion, two hundred six billion, eight hundred eighty million, seven hundred eighty-two thousand, one hundred sixty".