561523303325165 has 16 divisors (see below), whose sum is σ = 680371709367168. Its totient is φ = 444856167875136.

The previous prime is 561523303325147. The next prime is 561523303325207.

561523303325165 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 561523303325165 - 2³⁸ = 561248425418221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244008659 + ... + 246299151.

It is an arithmetic number, because the mean of its divisors is an integer number (42523231835448).

Almost surely, 2^{561523303325165} is an apocalyptic number.

It is an amenable number.

561523303325165 is a deficient number, since it is larger than the sum of its proper divisors (118848406042003).

561523303325165 is a wasteful number, since it uses less digits than its factorization.

561523303325165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766628.

The product of its (nonzero) digits is 7290000, while the sum is 50.

It can be divided in two parts, 56152330 and 3325165, that added together give a palindrome (59477495).

The spelling of 561523303325165 in words is "five hundred sixty-one trillion, five hundred twenty-three billion, three hundred three million, three hundred twenty-five thousand, one hundred sixty-five".