31216177661713 has 6 divisors (see below), whose sum is σ = 34311996934082. Its totient is φ = 28378343328720.

The previous prime is 31216177661639. The next prime is 31216177661797. The reversal of 31216177661713 is 31716677161213.

It can be written as a sum of positive squares in only one way, i.e., 15670450622464 + 15545727039249 = 3958592^2 + 3942807^2 .

It is not a de Polignac number, because 31216177661713 - 2²⁹ = 31215640790801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31216177661213) 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 5 ways as a sum of consecutive naturals, for example, 128992469556 + ... + 128992469797.

Almost surely, 2^{31216177661713} is an apocalyptic number.

It is an amenable number.

31216177661713 is a deficient number, since it is larger than the sum of its proper divisors (3095819272369).

31216177661713 is a wasteful number, since it uses less digits than its factorization.

31216177661713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257984939375 (or 257984939364 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The spelling of 31216177661713 in words is "thirty-one trillion, two hundred sixteen billion, one hundred seventy-seven million, six hundred sixty-one thousand, seven hundred thirteen".