31858464009321 has 24 divisors (see below), whose sum is σ = 46452836893320. Its totient is φ = 21038406391296.

The previous prime is 31858464009319. The next prime is 31858464009329. The reversal of 31858464009321 is 12390046485813.

It is a happy number.

31858464009321 is a `hidden beast` number, since 3 + 18 + 584 + 6 + 40 + 0 + 9 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1232632857600 + 30625831151721 = 1110240^2 + 5534061^2 .

It is not a de Polignac number, because 31858464009321 - 2¹ = 31858464009319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31858464009329) 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 in 23 ways as a sum of consecutive naturals, for example, 7687266 + ... + 11082011.

It is an arithmetic number, because the mean of its divisors is an integer number (1935534870555).

Almost surely, 2^{31858464009321} is an apocalyptic number.

It is an amenable number.

31858464009321 is a deficient number, since it is larger than the sum of its proper divisors (14594372883999).

31858464009321 is a wasteful number, since it uses less digits than its factorization.

31858464009321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18771065 (or 18771062 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 31858464009321 in words is "thirty-one trillion, eight hundred fifty-eight billion, four hundred sixty-four million, nine thousand, three hundred twenty-one".