16516252778790 has 32 divisors (see below), whose sum is σ = 39737857088736. Its totient is φ = 4393350694400.

The previous prime is 16516252778761. The next prime is 16516252778801. The reversal of 16516252778790 is 9787725261561.

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, 686449017 + ... + 686473076.

It is an arithmetic number, because the mean of its divisors is an integer number (1241808034023).

Almost surely, 2^{16516252778790} is an apocalyptic number.

16516252778790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16516252778790 is an abundant number, since it is smaller than the sum of its proper divisors (23221604309946).

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

16516252778790 is a wasteful number, since it uses less digits than its factorization.

16516252778790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372922504.

The product of its (nonzero) digits is 88905600, while the sum is 66.

The spelling of 16516252778790 in words is "sixteen trillion, five hundred sixteen billion, two hundred fifty-two million, seven hundred seventy-eight thousand, seven hundred ninety".