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12680360280 = 233257313741107
BaseRepresentation
bin10111100111100111…
…01111000101011000
31012201201100001012100
423303303233011120
5201432133012110
65454132043400
7626142166260
oct136363570530
935651301170
1012680360280
1154178073a5
12255a763560
1312710b8783
148841227a0
154e3363bc0
hex2f3cef158

12680360280 has 768 divisors, whose sum is σ = 51627663360. Its totient is φ = 2637619200.

The previous prime is 12680360269. The next prime is 12680360281. The reversal of 12680360280 is 8206308621.

12680360280 is a `hidden beast` number, since 12 + 6 + 8 + 0 + 360 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12680360281) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 118507987 + ... + 118508093.

It is an arithmetic number, because the mean of its divisors is an integer number (67223520).

Almost surely, 212680360280 is an apocalyptic number.

12680360280 is a gapful number since it is divisible by the number (10) 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 12680360280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25813831680).

12680360280 is an abundant number, since it is smaller than the sum of its proper divisors (38947303080).

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

12680360280 is a wasteful number, since it uses less digits than its factorization.

12680360280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 12680360280 in words is "twelve billion, six hundred eighty million, three hundred sixty thousand, two hundred eighty".