640963303734 has 32 divisors (see below), whose sum is σ = 1382404584960. Its totient is φ = 196952586912.

The previous prime is 640963303727. The next prime is 640963303763. The reversal of 640963303734 is 437303369046.

It is a congruent 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, 5502222 + ... + 5617505.

It is an arithmetic number, because the mean of its divisors is an integer number (43200143280).

Almost surely, 2^640963303734 is an apocalyptic number.

640963303734 is an abundant number, since it is smaller than the sum of its proper divisors (741441281226).

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

640963303734 is a wasteful number, since it uses less digits than its factorization.

640963303734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120484.

The product of its (nonzero) digits is 2939328, while the sum is 48.

The spelling of 640963303734 in words is "six hundred forty billion, nine hundred sixty-three million, three hundred three thousand, seven hundred thirty-four".