31138916694 has 32 divisors (see below), whose sum is σ = 65982314880. Its totient is φ = 9762986112.

The previous prime is 31138916659. The next prime is 31138916701. The reversal of 31138916694 is 49661983113.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70857 + ... + 259419.

It is an arithmetic number, because the mean of its divisors is an integer number (2061947340).

Almost surely, 2^31138916694 is an apocalyptic number.

31138916694 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31138916694 is an abundant number, since it is smaller than the sum of its proper divisors (34843398186).

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

31138916694 is a wasteful number, since it uses less digits than its factorization.

31138916694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190204.

The product of its digits is 839808, while the sum is 51.

The spelling of 31138916694 in words is "thirty-one billion, one hundred thirty-eight million, nine hundred sixteen thousand, six hundred ninety-four".