12557994624 has 128 divisors (see below), whose sum is σ = 42358396800. Its totient is φ = 3587991552.

The previous prime is 12557994611. The next prime is 12557994637. The reversal of 12557994624 is 42649975521.

It is a happy number.

12557994624 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 7 + 9 + 9 + 4 + 624 = 666.

It is an interprime number because it is at equal distance from previous prime (12557994611) and next prime (12557994637).

It is a tau number, because it is divible by the number of its divisors (128).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235357 + ... + 283740.

It is an arithmetic number, because the mean of its divisors is an integer number (330924975).

Almost surely, 2^12557994624 is an apocalyptic number.

12557994624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12557994624 is an abundant number, since it is smaller than the sum of its proper divisors (29800402176).

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

12557994624 is an equidigital number, since it uses as much as digits as its factorization.

12557994624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519127 (or 519109 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 12557994624 in words is "twelve billion, five hundred fifty-seven million, nine hundred ninety-four thousand, six hundred twenty-four".