561504405165 has 32 divisors (see below), whose sum is σ = 980747108352. Its totient is φ = 272059368000.

The previous prime is 561504405127. The next prime is 561504405173.

561504405165 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-561504405165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 914001 + ... + 1399430.

It is an arithmetic number, because the mean of its divisors is an integer number (30648347136).

Almost surely, 2^561504405165 is an apocalyptic number.

561504405165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561504405165 is a deficient number, since it is larger than the sum of its proper divisors (419242703187).

561504405165 is a wasteful number, since it uses less digits than its factorization.

561504405165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314921.

The product of its (nonzero) digits is 360000, while the sum is 42.

It can be divided in two parts, 561504 and 405165, that added together give a palindrome (966669).

The spelling of 561504405165 in words is "five hundred sixty-one billion, five hundred four million, four hundred five thousand, one hundred sixty-five".