31856368468 has 36 divisors (see below), whose sum is σ = 59947492500. Its totient is φ = 14805108864.

The previous prime is 31856368441. The next prime is 31856368471. The reversal of 31856368468 is 86486365813.

It can be written as a sum of positive squares in 2 ways, for example, as 12944067984 + 18912300484 = 113772^2 + 137522^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 131593 + ... + 284656.

It is an arithmetic number, because the mean of its divisors is an integer number (1665208125).

Almost surely, 2^31856368468 is an apocalyptic number.

31856368468 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31856368468 is a deficient number, since it is larger than the sum of its proper divisors (28091124032).

31856368468 is a wasteful number, since it uses less digits than its factorization.

31856368468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416344 (or 416323 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 58.

The spelling of 31856368468 in words is "thirty-one billion, eight hundred fifty-six million, three hundred sixty-eight thousand, four hundred sixty-eight".