12531566112555 has 96 divisors (see below), whose sum is σ = 24011630012160. Its totient is φ = 5560577890560.

The previous prime is 12531566112551. The next prime is 12531566112563. The reversal of 12531566112555 is 55521166513521.

It is not a de Polignac number, because 12531566112555 - 2² = 12531566112551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12531566112551) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10844820 + ... + 11944590.

It is an arithmetic number, because the mean of its divisors is an integer number (250121145960).

Almost surely, 2^{12531566112555} is an apocalyptic number.

12531566112555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12531566112555 is a deficient number, since it is larger than the sum of its proper divisors (11480063899605).

12531566112555 is a wasteful number, since it uses less digits than its factorization.

12531566112555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100249 (or 1100242 counting only the distinct ones).

The product of its digits is 1350000, while the sum is 48.

The spelling of 12531566112555 in words is "twelve trillion, five hundred thirty-one billion, five hundred sixty-six million, one hundred twelve thousand, five hundred fifty-five".