12508562997 has 16 divisors (see below), whose sum is σ = 21178519680. Its totient is φ = 7147750176.

The previous prime is 12508562981. The next prime is 12508563017. The reversal of 12508562997 is 79926580521.

12508562997 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 8 + 5 + 629 + 9 + 7 = 666.

It is not a de Polignac number, because 12508562997 - 2⁴ = 12508562981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508562917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33091248 + ... + 33091625.

It is an arithmetic number, because the mean of its divisors is an integer number (1323657480).

Almost surely, 2^12508562997 is an apocalyptic number.

It is an amenable number.

12508562997 is a deficient number, since it is larger than the sum of its proper divisors (8669956683).

12508562997 is an equidigital number, since it uses as much as digits as its factorization.

12508562997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66182889 (or 66182883 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 12508562997 in words is "twelve billion, five hundred eight million, five hundred sixty-two thousand, nine hundred ninety-seven".