31443872364 has 36 divisors (see below), whose sum is σ = 79899281280. Its totient is φ = 10426412640.

The previous prime is 31443872363. The next prime is 31443872377. The reversal of 31443872364 is 46327834413.

31443872364 is a `hidden beast` number, since 31 + 4 + 4 + 387 + 236 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (31443872363) 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, 2279619 + ... + 2293370.

It is an arithmetic number, because the mean of its divisors is an integer number (2219424480).

Almost surely, 2^31443872364 is an apocalyptic number.

It is an amenable number.

31443872364 is an abundant number, since it is smaller than the sum of its proper divisors (48455408916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31443872364 is a wasteful number, since it uses less digits than its factorization.

31443872364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573190 (or 4573185 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The spelling of 31443872364 in words is "thirty-one billion, four hundred forty-three million, eight hundred seventy-two thousand, three hundred sixty-four".