31960779811439 has 2 divisors, whose sum is σ = 31960779811440. Its totient is φ = 31960779811438.

The previous prime is 31960779811339. The next prime is 31960779811459. The reversal of 31960779811439 is 93411897706913.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31960779811439 - 2²⁴ = 31960763034223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31960779811459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15980389905719 + 15980389905720.

It is an arithmetic number, because the mean of its divisors is an integer number (15980389905720).

Almost surely, 2^{31960779811439} is an apocalyptic number.

31960779811439 is a deficient number, since it is larger than the sum of its proper divisors (1).

31960779811439 is an equidigital number, since it uses as much as digits as its factorization.

31960779811439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61725888, while the sum is 68.

The spelling of 31960779811439 in words is "thirty-one trillion, nine hundred sixty billion, seven hundred seventy-nine million, eight hundred eleven thousand, four hundred thirty-nine".