31640480118 has 32 divisors (see below), whose sum is σ = 75720808800. Its totient is φ = 9735532128.

The previous prime is 31640480093. The next prime is 31640480141. The reversal of 31640480118 is 81108404613.

It is a happy number.

31640480118 is a `hidden beast` number, since 3 + 1 + 64 + 0 + 480 + 118 = 666.

It is a super-2 number, since 2×31640480118² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 22535253 + ... + 22536656.

It is an arithmetic number, because the mean of its divisors is an integer number (2366275275).

Almost surely, 2^31640480118 is an apocalyptic number.

31640480118 is an abundant number, since it is smaller than the sum of its proper divisors (44080328682).

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

31640480118 is a wasteful number, since it uses less digits than its factorization.

31640480118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45071933 (or 45071927 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 31640480118 in words is "thirty-one billion, six hundred forty million, four hundred eighty thousand, one hundred eighteen".