31625717759989 has 2 divisors, whose sum is σ = 31625717759990. Its totient is φ = 31625717759988.

The previous prime is 31625717759921. The next prime is 31625717760047. The reversal of 31625717759989 is 98995771752613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28579181402500 + 3046536357489 = 5345950^2 + 1745433^2 .

It is a cyclic number.

It is not a de Polignac number, because 31625717759989 - 2⁷ = 31625717759861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31625717759089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15812858879994 + 15812858879995.

It is an arithmetic number, because the mean of its divisors is an integer number (15812858879995).

Almost surely, 2^{31625717759989} is an apocalyptic number.

It is an amenable number.

31625717759989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31625717759989 is an equidigital number, since it uses as much as digits as its factorization.

31625717759989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800338400, while the sum is 79.

The spelling of 31625717759989 in words is "thirty-one trillion, six hundred twenty-five billion, seven hundred seventeen million, seven hundred fifty-nine thousand, nine hundred eighty-nine".