4138864668631 has 16 divisors (see below), whose sum is σ = 5186336601600. Its totient is φ = 3208718328480.

The previous prime is 4138864668619. The next prime is 4138864668661. The reversal of 4138864668631 is 1368664688314.

It is not a de Polignac number, because 4138864668631 - 2²⁷ = 4138730450903 is a prime.

It is a super-2 number, since 2×4138864668631² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138864668661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136409931 + ... + 136440268.

It is an arithmetic number, because the mean of its divisors is an integer number (324146037600).

Almost surely, 2^{4138864668631} is an apocalyptic number.

4138864668631 is a deficient number, since it is larger than the sum of its proper divisors (1047471932969).

4138864668631 is a wasteful number, since it uses less digits than its factorization.

4138864668631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272850414.

The product of its digits is 95551488, while the sum is 64.

The spelling of 4138864668631 in words is "four trillion, one hundred thirty-eight billion, eight hundred sixty-four million, six hundred sixty-eight thousand, six hundred thirty-one".