31402145664 has 64 divisors (see below), whose sum is σ = 92679954000. Its totient is φ = 10467380736.

The previous prime is 31402145657. The next prime is 31402145681. The reversal of 31402145664 is 46654120413.

31402145664 is a `hidden beast` number, since 3 + 140 + 2 + 1 + 456 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 4539679 + ... + 4546590.

Almost surely, 2^31402145664 is an apocalyptic number.

It is an amenable number.

31402145664 is an abundant number, since it is smaller than the sum of its proper divisors (61277808336).

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

31402145664 is an equidigital number, since it uses as much as digits as its factorization.

31402145664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9086292 (or 9086274 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 31402145664 in words is "thirty-one billion, four hundred two million, one hundred forty-five thousand, six hundred sixty-four".