31351389456 has 40 divisors (see below), whose sum is σ = 80998056864. Its totient is φ = 10449564160.

The previous prime is 31351389439. The next prime is 31351389463. The reversal of 31351389456 is 65498315313.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768616 + ... + 808376.

Almost surely, 2^31351389456 is an apocalyptic number.

It is an amenable number.

31351389456 is an abundant number, since it is smaller than the sum of its proper divisors (49646667408).

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

31351389456 is a wasteful number, since it uses less digits than its factorization.

31351389456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56199 (or 56193 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 48.

The spelling of 31351389456 in words is "thirty-one billion, three hundred fifty-one million, three hundred eighty-nine thousand, four hundred fifty-six".