31809752911 has 2 divisors, whose sum is σ = 31809752912. Its totient is φ = 31809752910.

The previous prime is 31809752879. The next prime is 31809752917. The reversal of 31809752911 is 11925790813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31809752911 - 2⁵ = 31809752879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31809752917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15904876455 + 15904876456.

It is an arithmetic number, because the mean of its divisors is an integer number (15904876456).

Almost surely, 2^31809752911 is an apocalyptic number.

31809752911 is a deficient number, since it is larger than the sum of its proper divisors (1).

31809752911 is an equidigital number, since it uses as much as digits as its factorization.

31809752911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 31809752911 in words is "thirty-one billion, eight hundred nine million, seven hundred fifty-two thousand, nine hundred eleven".