561323525323165 has 24 divisors (see below), whose sum is σ = 741874117572000. Its totient is φ = 407417184129120.

The previous prime is 561323525323163. The next prime is 561323525323243.

561323525323165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 561323525323165 - 2¹ = 561323525323163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561323525323163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 929364919 + ... + 929968708.

It is an arithmetic number, because the mean of its divisors is an integer number (30911421565500).

Almost surely, 2^{561323525323165} is an apocalyptic number.

561323525323165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561323525323165 is a deficient number, since it is larger than the sum of its proper divisors (180550592248835).

561323525323165 is a wasteful number, since it uses less digits than its factorization.

561323525323165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859334153 (or 1859334142 counting only the distinct ones).

The product of its digits is 14580000, while the sum is 52.

The spelling of 561323525323165 in words is "five hundred sixty-one trillion, three hundred twenty-three billion, five hundred twenty-five million, three hundred twenty-three thousand, one hundred sixty-five".