31979872511 has 2 divisors, whose sum is σ = 31979872512. Its totient is φ = 31979872510.

The previous prime is 31979872481. The next prime is 31979872571. The reversal of 31979872511 is 11527897913.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31979872511 - 2³⁰ = 30906130687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31979872571) 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, 15989936255 + 15989936256.

It is an arithmetic number, because the mean of its divisors is an integer number (15989936256).

Almost surely, 2^31979872511 is an apocalyptic number.

31979872511 is a deficient number, since it is larger than the sum of its proper divisors (1).

31979872511 is an equidigital number, since it uses as much as digits as its factorization.

31979872511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 53.

The spelling of 31979872511 in words is "thirty-one billion, nine hundred seventy-nine million, eight hundred seventy-two thousand, five hundred eleven".