64631166113646 has 64 divisors (see below), whose sum is σ = 156682797638400. Its totient is φ = 19585054000800.

The previous prime is 64631166113627. The next prime is 64631166113669.

64631166113646 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 1 + 16 + 611 + 3 + 6 + 4 + 6 = 666.

64631166113646 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64631166113592 and 64631166113601.

It is a congruent number.

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, 98288785 + ... + 98944163.

It is an arithmetic number, because the mean of its divisors is an integer number (2448168713100).

Almost surely, 2^{64631166113646} is an apocalyptic number.

64631166113646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64631166113646 is an abundant number, since it is smaller than the sum of its proper divisors (92051631524754).

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

64631166113646 is a wasteful number, since it uses less digits than its factorization.

64631166113646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821422 (or 821416 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 64631166113646 in words is "sixty-four trillion, six hundred thirty-one billion, one hundred sixty-six million, one hundred thirteen thousand, six hundred forty-six".