31612542643 has 12 divisors (see below), whose sum is σ = 35066471440. Its totient is φ = 28475005680.

The previous prime is 31612542629. The next prime is 31612542649. The reversal of 31612542643 is 34624521613.

It is not a de Polignac number, because 31612542643 - 2²⁵ = 31578988211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31612542649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1185255 + ... + 1211632.

Almost surely, 2^31612542643 is an apocalyptic number.

31612542643 is a deficient number, since it is larger than the sum of its proper divisors (3453928797).

31612542643 is a wasteful number, since it uses less digits than its factorization.

31612542643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397018 (or 2397007 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The spelling of 31612542643 in words is "thirty-one billion, six hundred twelve million, five hundred forty-two thousand, six hundred forty-three".