12556613600 has 72 divisors (see below), whose sum is σ = 32267231640. Its totient is φ = 4758289920.

The previous prime is 12556613569. The next prime is 12556613617. The reversal of 12556613600 is 631665521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397847 + ... + 428246.

It is an arithmetic number, because the mean of its divisors is an integer number (448155995).

Almost surely, 2^12556613600 is an apocalyptic number.

12556613600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12556613600 is an abundant number, since it is smaller than the sum of its proper divisors (19710618040).

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

12556613600 is a wasteful number, since it uses less digits than its factorization.

12556613600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826132 (or 826119 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 12556613600 in words is "twelve billion, five hundred fifty-six million, six hundred thirteen thousand, six hundred".