561231323132165 has 48 divisors (see below), whose sum is σ = 784593317440512. Its totient is φ = 384274807733376.

The previous prime is 561231323132147. The next prime is 561231323132197.

561231323132165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 561231323132165 - 2¹⁶ = 561231323066629 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 47 ways as a sum of consecutive naturals, for example, 475315259 + ... + 476494551.

It is an arithmetic number, because the mean of its divisors is an integer number (16345694113344).

Almost surely, 2^{561231323132165} is an apocalyptic number.

It is an amenable number.

561231323132165 is a deficient number, since it is larger than the sum of its proper divisors (223361994308347).

561231323132165 is a wasteful number, since it uses less digits than its factorization.

561231323132165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182186 (or 1182179 counting only the distinct ones).

The product of its digits is 583200, while the sum is 44.

The spelling of 561231323132165 in words is "five hundred sixty-one trillion, two hundred thirty-one billion, three hundred twenty-three million, one hundred thirty-two thousand, one hundred sixty-five".