31400164644 has 12 divisors (see below), whose sum is σ = 73267050864. Its totient is φ = 10466721544.

The previous prime is 31400164597. The next prime is 31400164723. The reversal of 31400164644 is 44646100413.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308340182 + ... + 1308340205.

It is an arithmetic number, because the mean of its divisors is an integer number (6105587572).

Almost surely, 2^31400164644 is an apocalyptic number.

It is an amenable number.

31400164644 is an abundant number, since it is smaller than the sum of its proper divisors (41866886220).

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

31400164644 is a wasteful number, since it uses less digits than its factorization.

31400164644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616680394 (or 2616680392 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 31400164644 in words is "thirty-one billion, four hundred million, one hundred sixty-four thousand, six hundred forty-four".