16531604660 has 24 divisors (see below), whose sum is σ = 36225778176. Its totient is φ = 6325135520.

The previous prime is 16531604659. The next prime is 16531604681. The reversal of 16531604660 is 6640613561.

16531604660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17968676 + ... + 17969595.

It is an arithmetic number, because the mean of its divisors is an integer number (1509407424).

Almost surely, 2^16531604660 is an apocalyptic number.

16531604660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16531604660 is an abundant number, since it is smaller than the sum of its proper divisors (19694173516).

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

16531604660 is a wasteful number, since it uses less digits than its factorization.

16531604660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35938303 (or 35938301 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 16531604660 in words is "sixteen billion, five hundred thirty-one million, six hundred four thousand, six hundred sixty".