12537634432 has 32 divisors (see below), whose sum is σ = 24988914720. Its totient is φ = 6265906944.

The previous prime is 12537634429. The next prime is 12537634457. The reversal of 12537634432 is 23443673521.

It is a tau number, because it is divible by the number of its divisors (32).

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, 268573 + ... + 311779.

It is an arithmetic number, because the mean of its divisors is an integer number (780903585).

Almost surely, 2^12537634432 is an apocalyptic number.

It is an amenable number.

12537634432 is a deficient number, since it is larger than the sum of its proper divisors (12451280288).

12537634432 is an equidigital number, since it uses as much as digits as its factorization.

12537634432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45488 (or 45476 counting only the distinct ones).

The product of its digits is 362880, while the sum is 40.

The spelling of 12537634432 in words is "twelve billion, five hundred thirty-seven million, six hundred thirty-four thousand, four hundred thirty-two".