31486690944 has 96 divisors (see below), whose sum is σ = 90653103840. Its totient is φ = 10490135040.

The previous prime is 31486690931. The next prime is 31486690973. The reversal of 31486690944 is 44909668413.

It is a happy number.

31486690944 is a `hidden beast` number, since 31 + 486 + 6 + 90 + 9 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×31486690944² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2656359 + ... + 2668185.

It is an arithmetic number, because the mean of its divisors is an integer number (944303165).

Almost surely, 2^31486690944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31486690944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45326551920).

31486690944 is an abundant number, since it is smaller than the sum of its proper divisors (59166412896).

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

31486690944 is a wasteful number, since it uses less digits than its factorization.

31486690944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14158 (or 14143 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 31486690944 in words is "thirty-one billion, four hundred eighty-six million, six hundred ninety thousand, nine hundred forty-four".