12557685888 has 144 divisors (see below), whose sum is σ = 39720230550. Its totient is φ = 3805317120.

The previous prime is 12557685853. The next prime is 12557685913. The reversal of 12557685888 is 88858675521.

12557685888 is a `hidden beast` number, since 1 + 2 + 5 + 576 + 8 + 58 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10223636544 + 2334049344 = 101112^2 + 48312^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 94348 + ... + 184436.

Almost surely, 2^12557685888 is an apocalyptic number.

12557685888 is a gapful number since it is divisible by the number (18) 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 12557685888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19860115275).

12557685888 is an abundant number, since it is smaller than the sum of its proper divisors (27162544662).

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

12557685888 is a wasteful number, since it uses less digits than its factorization.

12557685888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90131 (or 90105 counting only the distinct ones).

The product of its digits is 43008000, while the sum is 63.

The spelling of 12557685888 in words is "twelve billion, five hundred fifty-seven million, six hundred eighty-five thousand, eight hundred eighty-eight".