641264433304166 has 16 divisors (see below), whose sum is σ = 1099715658211104. Its totient is φ = 274726313993664.

The previous prime is 641264433304093. The next prime is 641264433304199. The reversal of 641264433304166 is 661403334462146.

It is a super-2 number, since 2×641264433304166² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8441650625 + ... + 8441726588.

It is an arithmetic number, because the mean of its divisors is an integer number (68732228638194).

Almost surely, 2^{641264433304166} is an apocalyptic number.

641264433304166 is a deficient number, since it is larger than the sum of its proper divisors (458451224906938).

641264433304166 is a wasteful number, since it uses less digits than its factorization.

641264433304166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16883379935.

The product of its (nonzero) digits is 17915904, while the sum is 53.

The spelling of 641264433304166 in words is "six hundred forty-one trillion, two hundred sixty-four billion, four hundred thirty-three million, three hundred four thousand, one hundred sixty-six".