646044350465555 has 32 divisors (see below), whose sum is σ = 823506353579520. Its totient is φ = 484863061777920.

The previous prime is 646044350465533. The next prime is 646044350465587. The reversal of 646044350465555 is 555564053440646.

It is not a de Polignac number, because 646044350465555 - 2²⁸ = 646044082030099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3722674976 + ... + 3722848514.

It is an arithmetic number, because the mean of its divisors is an integer number (25734573549360).

Almost surely, 2^{646044350465555} is an apocalyptic number.

646044350465555 is a deficient number, since it is larger than the sum of its proper divisors (177462003113965).

646044350465555 is a wasteful number, since it uses less digits than its factorization.

646044350465555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314699.

The product of its (nonzero) digits is 518400000, while the sum is 62.

The spelling of 646044350465555 in words is "six hundred forty-six trillion, forty-four billion, three hundred fifty million, four hundred sixty-five thousand, five hundred fifty-five".