31168160639 has 16 divisors (see below), whose sum is σ = 39652051200. Its totient is φ = 24286875480.

The previous prime is 31168160629. The next prime is 31168160663. The reversal of 31168160639 is 93606186113.

It is not a de Polignac number, because 31168160639 - 2⁴ = 31168160623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31168160639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31168160629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4126649 + ... + 4134194.

It is an arithmetic number, because the mean of its divisors is an integer number (2478253200).

Almost surely, 2^31168160639 is an apocalyptic number.

31168160639 is a deficient number, since it is larger than the sum of its proper divisors (8483890561).

31168160639 is an equidigital number, since it uses as much as digits as its factorization.

31168160639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260875 (or 8260861 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 31168160639 in words is "thirty-one billion, one hundred sixty-eight million, one hundred sixty thousand, six hundred thirty-nine".