31138723676 has 24 divisors (see below), whose sum is σ = 58227578640. Its totient is φ = 14519077632.

The previous prime is 31138723669. The next prime is 31138723723. The reversal of 31138723676 is 67632783113.

It is a super-2 number, since 2×31138723676² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31138723676.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093150 + ... + 2107973.

It is an arithmetic number, because the mean of its divisors is an integer number (2426149110).

Almost surely, 2^31138723676 is an apocalyptic number.

It is an amenable number.

31138723676 is a deficient number, since it is larger than the sum of its proper divisors (27088854964).

31138723676 is a wasteful number, since it uses less digits than its factorization.

31138723676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201253 (or 4201251 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The spelling of 31138723676 in words is "thirty-one billion, one hundred thirty-eight million, seven hundred twenty-three thousand, six hundred seventy-six".