640115497704 has 64 divisors (see below), whose sum is σ = 1625211455040. Its totient is φ = 210059619840.

The previous prime is 640115497673. The next prime is 640115497711. The reversal of 640115497704 is 407794511046.

640115497704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610159 + ... + 1285505.

It is an arithmetic number, because the mean of its divisors is an integer number (25393928985).

Almost surely, 2^640115497704 is an apocalyptic number.

It is an amenable number.

640115497704 is an abundant number, since it is smaller than the sum of its proper divisors (985095957336).

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

640115497704 is a wasteful number, since it uses less digits than its factorization.

640115497704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675970 (or 675966 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 640115497704 in words is "six hundred forty billion, one hundred fifteen million, four hundred ninety-seven thousand, seven hundred four".