31643644125 has 32 divisors (see below), whose sum is σ = 54078156288. Its totient is φ = 16420478400.

The previous prime is 31643644079. The next prime is 31643644129. The reversal of 31643644125 is 52144634613.

It is not a de Polignac number, because 31643644125 - 2¹⁷ = 31643513053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31643644129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1126437 + ... + 1154186.

It is an arithmetic number, because the mean of its divisors is an integer number (1689942384).

Almost surely, 2^31643644125 is an apocalyptic number.

It is an amenable number.

31643644125 is a deficient number, since it is larger than the sum of its proper divisors (22434512163).

31643644125 is a wasteful number, since it uses less digits than its factorization.

31643644125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280678 (or 2280668 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The spelling of 31643644125 in words is "thirty-one billion, six hundred forty-three million, six hundred forty-four thousand, one hundred twenty-five".