561324423165 has 16 divisors (see below), whose sum is σ = 979766266176. Its totient is φ = 272157296000.

The previous prime is 561324423137. The next prime is 561324423193.

561324423165 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (561324423137) and next prime (561324423193).

It is not a de Polignac number, because 561324423165 - 2⁹ = 561324422653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1700982936 + ... + 1700983265.

It is an arithmetic number, because the mean of its divisors is an integer number (61235391636).

Almost surely, 2^561324423165 is an apocalyptic number.

561324423165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561324423165 is a deficient number, since it is larger than the sum of its proper divisors (418441843011).

561324423165 is a wasteful number, since it uses less digits than its factorization.

561324423165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401966220.

The product of its digits is 518400, while the sum is 42.

It can be divided in two parts, 561324 and 423165, that added together give a palindrome (984489).

The spelling of 561324423165 in words is "five hundred sixty-one billion, three hundred twenty-four million, four hundred twenty-three thousand, one hundred sixty-five".