31087641986968 has 16 divisors (see below), whose sum is σ = 66616375686480. Its totient is φ = 13323275137248.

The previous prime is 31087641986953. The next prime is 31087641986987. The reversal of 31087641986968 is 86968914678013.

It is a junction number, because it is equal to n+sod(n) for n = 31087641986894 and 31087641986903.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 277568231971 + ... + 277568232082.

It is an arithmetic number, because the mean of its divisors is an integer number (4163523480405).

Almost surely, 2^{31087641986968} is an apocalyptic number.

It is an amenable number.

31087641986968 is an abundant number, since it is smaller than the sum of its proper divisors (35528733699512).

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

31087641986968 is a wasteful number, since it uses less digits than its factorization.

31087641986968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555136464066 (or 555136464062 counting only the distinct ones).

The product of its (nonzero) digits is 752467968, while the sum is 76.

The spelling of 31087641986968 in words is "thirty-one trillion, eighty-seven billion, six hundred forty-one million, nine hundred eighty-six thousand, nine hundred sixty-eight".