31610876868 has 18 divisors (see below), whose sum is σ = 79905272174. Its totient is φ = 10536958944.

The previous prime is 31610876863. The next prime is 31610876881. The reversal of 31610876868 is 86867801613.

It can be written as a sum of positive squares in only one way, i.e., 21658420224 + 9952456644 = 147168^2 + 99762^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (31610876863) 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 in 5 ways as a sum of consecutive naturals, for example, 439039921 + ... + 439039992.

Almost surely, 2^31610876868 is an apocalyptic number.

It is an amenable number.

31610876868 is an abundant number, since it is smaller than the sum of its proper divisors (48294395306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31610876868 is a wasteful number, since it uses less digits than its factorization.

31610876868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878079923 (or 878079918 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 31610876868 in words is "thirty-one billion, six hundred ten million, eight hundred seventy-six thousand, eight hundred sixty-eight".