31840360957 has 2 divisors, whose sum is σ = 31840360958. Its totient is φ = 31840360956.

The previous prime is 31840360939. The next prime is 31840360961. The reversal of 31840360957 is 75906304813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18045623556 + 13794737401 = 134334^2 + 117451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31840360957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31840363957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15920180478 + 15920180479.

It is an arithmetic number, because the mean of its divisors is an integer number (15920180479).

Almost surely, 2^31840360957 is an apocalyptic number.

It is an amenable number.

31840360957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31840360957 is an equidigital number, since it uses as much as digits as its factorization.

31840360957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 31840360957 in words is "thirty-one billion, eight hundred forty million, three hundred sixty thousand, nine hundred fifty-seven".