31485511664 has 20 divisors (see below), whose sum is σ = 61006902600. Its totient is φ = 15741794880.

The previous prime is 31485511663. The next prime is 31485511703. The reversal of 31485511664 is 46611558413.

It is a happy number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31485511663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262862 + ... + 363410.

It is an arithmetic number, because the mean of its divisors is an integer number (3050345130).

Almost surely, 2^31485511664 is an apocalyptic number.

It is an amenable number.

31485511664 is a deficient number, since it is larger than the sum of its proper divisors (29521390936).

31485511664 is a wasteful number, since it uses less digits than its factorization.

31485511664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120128 (or 120122 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The spelling of 31485511664 in words is "thirty-one billion, four hundred eighty-five million, five hundred eleven thousand, six hundred sixty-four".