16260720656 has 20 divisors (see below), whose sum is σ = 32521442304. Its totient is φ = 7868090400.

The previous prime is 16260720631. The next prime is 16260720659. The reversal of 16260720656 is 65602706261.

16260720656 is an admirable number.

It is a super-2 number, since 2×16260720656² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16260720659) 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, 16391360 + ... + 16392351.

Almost surely, 2^16260720656 is an apocalyptic number.

16260720656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16260720656 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16260720656 is a wasteful number, since it uses less digits than its factorization.

16260720656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32783750 (or 32783744 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 16260720656 in words is "sixteen billion, two hundred sixty million, seven hundred twenty thousand, six hundred fifty-six".