32318400918640 has 20 divisors (see below), whose sum is σ = 75140282136024. Its totient is φ = 12927360367424.

The previous prime is 32318400918623. The next prime is 32318400918659. The reversal of 32318400918640 is 4681900481323.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201990005662 + ... + 201990005821.

Almost surely, 2^{32318400918640} is an apocalyptic number.

It is an amenable number.

32318400918640 is an abundant number, since it is smaller than the sum of its proper divisors (42821881217384).

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

32318400918640 is a wasteful number, since it uses less digits than its factorization.

32318400918640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403980011496 (or 403980011490 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 32318400918640 in words is "thirty-two trillion, three hundred eighteen billion, four hundred million, nine hundred eighteen thousand, six hundred forty".