12557015560 has 16 divisors (see below), whose sum is σ = 28253285100. Its totient is φ = 5022806208.

The previous prime is 12557015557. The next prime is 12557015591. The reversal of 12557015560 is 6551075521.

It can be written as a sum of positive squares in 2 ways, for example, as 12059993124 + 497022436 = 109818^2 + 22294^2 .

It is a super-2 number, since 2×12557015560² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156962655 + ... + 156962734.

Almost surely, 2^12557015560 is an apocalyptic number.

12557015560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12557015560 is an abundant number, since it is smaller than the sum of its proper divisors (15696269540).

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

12557015560 is a wasteful number, since it uses less digits than its factorization.

12557015560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313925400 (or 313925396 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 12557015560 in words is "twelve billion, five hundred fifty-seven million, fifteen thousand, five hundred sixty".