16564703317255 has 4 divisors (see below), whose sum is σ = 19877643980712. Its totient is φ = 13251762653800.

The previous prime is 16564703317247. The next prime is 16564703317297. The reversal of 16564703317255 is 55271330746561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16564703317255 - 2³ = 16564703317247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16564703317196 and 16564703317205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656470331721 + ... + 1656470331730.

It is an arithmetic number, because the mean of its divisors is an integer number (4969410995178).

Almost surely, 2^{16564703317255} is an apocalyptic number.

16564703317255 is a deficient number, since it is larger than the sum of its proper divisors (3312940663457).

16564703317255 is an equidigital number, since it uses as much as digits as its factorization.

16564703317255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312940663456.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 16564703317255 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred three million, three hundred seventeen thousand, two hundred fifty-five".