12451634657 has 24 divisors (see below), whose sum is σ = 16168835232. Its totient is φ = 9476913600.

The previous prime is 12451634639. The next prime is 12451634669. The reversal of 12451634657 is 75643615421.

It is not a de Polignac number, because 12451634657 - 2⁶ = 12451634593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12451634357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245444 + ... + 291797.

It is an arithmetic number, because the mean of its divisors is an integer number (673701468).

Almost surely, 2^12451634657 is an apocalyptic number.

It is an amenable number.

12451634657 is a deficient number, since it is larger than the sum of its proper divisors (3717200575).

12451634657 is a wasteful number, since it uses less digits than its factorization.

12451634657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537309 (or 537302 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The spelling of 12451634657 in words is "twelve billion, four hundred fifty-one million, six hundred thirty-four thousand, six hundred fifty-seven".