640261834082 has 16 divisors (see below), whose sum is σ = 1034282401152. Its totient is φ = 295501666320.

The previous prime is 640261834067. The next prime is 640261834099. The reversal of 640261834082 is 280438162046.

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, 3512393 + ... + 3690179.

It is an arithmetic number, because the mean of its divisors is an integer number (64642650072).

Almost surely, 2^640261834082 is an apocalyptic number.

640261834082 is a deficient number, since it is larger than the sum of its proper divisors (394020567070).

640261834082 is a wasteful number, since it uses less digits than its factorization.

640261834082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316313.

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 640261834082 in words is "six hundred forty billion, two hundred sixty-one million, eight hundred thirty-four thousand, eighty-two".