640115500466 has 32 divisors (see below), whose sum is σ = 1058887468800. Its totient is φ = 288420612480.

The previous prime is 640115500457. The next prime is 640115500477. The reversal of 640115500466 is 664005511046.

It is a happy number.

640115500466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 1568000 + ... + 1933611.

It is an arithmetic number, because the mean of its divisors is an integer number (33090233400).

Almost surely, 2^640115500466 is an apocalyptic number.

640115500466 is a deficient number, since it is larger than the sum of its proper divisors (418771968334).

640115500466 is a wasteful number, since it uses less digits than its factorization.

640115500466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501794.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 640115500466 in words is "six hundred forty billion, one hundred fifteen million, five hundred thousand, four hundred sixty-six".