31356503864 has 24 divisors (see below), whose sum is σ = 67195347960. Its totient is φ = 13437933744.

The previous prime is 31356503839. The next prime is 31356503873. The reversal of 31356503864 is 46830565313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1313297 + ... + 1336959.

It is an arithmetic number, because the mean of its divisors is an integer number (2799806165).

Almost surely, 2^31356503864 is an apocalyptic number.

It is an amenable number.

31356503864 is an abundant number, since it is smaller than the sum of its proper divisors (35838844096).

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

31356503864 is an frugal number, since it uses more digits than its factorization.

31356503864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47339 (or 23672 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 31356503864 in words is "thirty-one billion, three hundred fifty-six million, five hundred three thousand, eight hundred sixty-four".