31655568713 has 2 divisors, whose sum is σ = 31655568714. Its totient is φ = 31655568712.

The previous prime is 31655568661. The next prime is 31655568719. The reversal of 31655568713 is 31786555613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19771734544 + 11883834169 = 140612^2 + 109013^2 .

It is a cyclic number.

It is not a de Polignac number, because 31655568713 - 2¹⁶ = 31655503177 is a prime.

It is not a weakly prime, because it can be changed into another prime (31655568719) 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 as a sum of consecutive naturals, namely, 15827784356 + 15827784357.

It is an arithmetic number, because the mean of its divisors is an integer number (15827784357).

Almost surely, 2^31655568713 is an apocalyptic number.

It is an amenable number.

31655568713 is a deficient number, since it is larger than the sum of its proper divisors (1).

31655568713 is an equidigital number, since it uses as much as digits as its factorization.

31655568713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 50.

The spelling of 31655568713 in words is "thirty-one billion, six hundred fifty-five million, five hundred sixty-eight thousand, seven hundred thirteen".