12451634656 has 24 divisors (see below), whose sum is σ = 24859430064. Its totient is φ = 6138128640.

The previous prime is 12451634639. The next prime is 12451634669. The reversal of 12451634656 is 65643615421.

It is a congruent number.

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, 2737965 + ... + 2742508.

It is an arithmetic number, because the mean of its divisors is an integer number (1035809586).

Almost surely, 2^12451634656 is an apocalyptic number.

12451634656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12451634656 is a deficient number, since it is larger than the sum of its proper divisors (12407795408).

12451634656 is an equidigital number, since it uses as much as digits as its factorization.

12451634656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480554 (or 5480546 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 12451634656 in words is "twelve billion, four hundred fifty-one million, six hundred thirty-four thousand, six hundred fifty-six".