16165665056 has 24 divisors (see below), whose sum is σ = 31869976320. Its totient is φ = 8071702848.

The previous prime is 16165665049. The next prime is 16165665059. The reversal of 16165665056 is 65056656161.

It is a super-2 number, since 2×16165665056² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16165665056.

It is not an unprimeable number, because it can be changed into a prime (16165665059) 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, 324176 + ... + 370703.

It is an arithmetic number, because the mean of its divisors is an integer number (1327915680).

Almost surely, 2^16165665056 is an apocalyptic number.

16165665056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16165665056 is a deficient number, since it is larger than the sum of its proper divisors (15704311264).

16165665056 is an equidigital number, since it uses as much as digits as its factorization.

16165665056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695616 (or 695608 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 16165665056 in words is "sixteen billion, one hundred sixty-five million, six hundred sixty-five thousand, fifty-six".