641108177166 has 16 divisors (see below), whose sum is σ = 1282229097984. Its totient is φ = 213700601784.

The previous prime is 641108177161. The next prime is 641108177173. The reversal of 641108177166 is 661771801146.

It is a super-2 number, since 2×641108177166² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641108177161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200545 + ... + 1149971.

It is an arithmetic number, because the mean of its divisors is an integer number (80139318624).

Almost surely, 2^641108177166 is an apocalyptic number.

641108177166 is an abundant number, since it is smaller than the sum of its proper divisors (641120920818).

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

641108177166 is a wasteful number, since it uses less digits than its factorization.

641108177166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061975.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 641108177166 in words is "six hundred forty-one billion, one hundred eight million, one hundred seventy-seven thousand, one hundred sixty-six".