12557516715 has 24 divisors (see below), whose sum is σ = 21778092960. Its totient is φ = 6693732864.

The previous prime is 12557516711. The next prime is 12557516759. The reversal of 12557516715 is 51761575521.

12557516715 is a `hidden beast` number, since 1 + 2 + 5 + 575 + 1 + 6 + 71 + 5 = 666.

It is not a de Polignac number, because 12557516715 - 2² = 12557516711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (12557516711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10299 + ... + 158811.

It is an arithmetic number, because the mean of its divisors is an integer number (907420540).

Almost surely, 2^12557516715 is an apocalyptic number.

12557516715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12557516715 is a deficient number, since it is larger than the sum of its proper divisors (9220576245).

12557516715 is a wasteful number, since it uses less digits than its factorization.

12557516715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150403 (or 150400 counting only the distinct ones).

The product of its digits is 367500, while the sum is 45.

The spelling of 12557516715 in words is "twelve billion, five hundred fifty-seven million, five hundred sixteen thousand, seven hundred fifteen".