16855352005 has 4 divisors (see below), whose sum is σ = 20226422412. Its totient is φ = 13484281600.

The previous prime is 16855351999. The next prime is 16855352021. The reversal of 16855352005 is 50025355861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8561060676 + 8294291329 = 92526^2 + 91073^2 .

It is not a de Polignac number, because 16855352005 - 2²⁷ = 16721134277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685535196 + ... + 1685535205.

It is an arithmetic number, because the mean of its divisors is an integer number (5056605603).

Almost surely, 2^16855352005 is an apocalyptic number.

It is an amenable number.

16855352005 is a deficient number, since it is larger than the sum of its proper divisors (3371070407).

16855352005 is an equidigital number, since it uses as much as digits as its factorization.

16855352005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371070406.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 16855352005 in words is "sixteen billion, eight hundred fifty-five million, three hundred fifty-two thousand, five".