641054171664 has 30 divisors (see below), whose sum is σ = 1794061328046. Its totient is φ = 213684723840.

The previous prime is 641054171603. The next prime is 641054171683. The reversal of 641054171664 is 466171450146.

641054171664 is a `hidden beast` number, since 6 + 41 + 0 + 541 + 7 + 1 + 6 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 530723906064 + 110330265600 = 728508^2 + 332160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2225882397 + ... + 2225882684.

Almost surely, 2^641054171664 is an apocalyptic number.

It is an amenable number.

641054171664 is an abundant number, since it is smaller than the sum of its proper divisors (1153007156382).

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

641054171664 is a wasteful number, since it uses less digits than its factorization.

641054171664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451765095 (or 4451765086 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 641054171664 in words is "six hundred forty-one billion, fifty-four million, one hundred seventy-one thousand, six hundred sixty-four".