16556214772523 has 64 divisors (see below), whose sum is σ = 18242057433600. Its totient is φ = 14963692584960.

The previous prime is 16556214772483. The next prime is 16556214772543. The reversal of 16556214772523 is 32527741265561.

It is not a de Polignac number, because 16556214772523 - 2²⁰ = 16556213723947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556214772543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10113752861 + ... + 10113754497.

It is an arithmetic number, because the mean of its divisors is an integer number (285032147400).

Almost surely, 2^{16556214772523} is an apocalyptic number.

16556214772523 is a deficient number, since it is larger than the sum of its proper divisors (1685842661077).

16556214772523 is a wasteful number, since it uses less digits than its factorization.

16556214772523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600.

The product of its digits is 21168000, while the sum is 56.

The spelling of 16556214772523 in words is "sixteen trillion, five hundred fifty-six billion, two hundred fourteen million, seven hundred seventy-two thousand, five hundred twenty-three".