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210489994638 = 2327113716092551
BaseRepresentation
bin1100010000001000101…
…1100110110110001110
3202010022102001121220100
43010002023212312032
511422040414312023
6240410415031530
721131065301520
oct3040213466616
9663272047810
10210489994638
11812a5129460
123496480b5a6
1316b0669a5b1
14a28b353a10
15571e370c43
hex31022e6d8e

210489994638 has 192 divisors, whose sum is σ = 584555811840. Its totient is φ = 53141184000.

The previous prime is 210489994621. The next prime is 210489994651. The reversal of 210489994638 is 836499984012.

210489994638 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 89 + 99 + 463 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82511463 + ... + 82514013.

It is an arithmetic number, because the mean of its divisors is an integer number (3044561520).

Almost surely, 2210489994638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210489994638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292277905920).

210489994638 is an abundant number, since it is smaller than the sum of its proper divisors (374065817202).

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

210489994638 is a wasteful number, since it uses less digits than its factorization.

210489994638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 210489994638 in words is "two hundred ten billion, four hundred eighty-nine million, nine hundred ninety-four thousand, six hundred thirty-eight".