16457712720 has 80 divisors (see below), whose sum is σ = 51032358720. Its totient is φ = 4387566592.

The previous prime is 16457712679. The next prime is 16457712731. The reversal of 16457712720 is 2721775461.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1293751 + ... + 1306409.

It is an arithmetic number, because the mean of its divisors is an integer number (637904484).

Almost surely, 2^16457712720 is an apocalyptic number.

16457712720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16457712720 is an abundant number, since it is smaller than the sum of its proper divisors (34574646000).

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

16457712720 is a wasteful number, since it uses less digits than its factorization.

16457712720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18092 (or 18086 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 16457712720 in words is "sixteen billion, four hundred fifty-seven million, seven hundred twelve thousand, seven hundred twenty".