16391659680 has 144 divisors (see below), whose sum is σ = 61021737504. Its totient is φ = 3973731840.

The previous prime is 16391659577. The next prime is 16391659693. The reversal of 16391659680 is 8695619361.

16391659680 is a `hidden beast` number, since 1 + 6 + 39 + 16 + 596 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501574 + ... + 533253.

It is an arithmetic number, because the mean of its divisors is an integer number (423762066).

Almost surely, 2^16391659680 is an apocalyptic number.

16391659680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16391659680 is an abundant number, since it is smaller than the sum of its proper divisors (44630077824).

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

16391659680 is a wasteful number, since it uses less digits than its factorization.

16391659680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034859 (or 1034848 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 16391659680 in words is "sixteen billion, three hundred ninety-one million, six hundred fifty-nine thousand, six hundred eighty".