23566321513 has 6 divisors (see below), whose sum is σ = 27413884266. Its totient is φ = 20199704112.

The previous prime is 23566321511. The next prime is 23566321523. The reversal of 23566321513 is 31512366532.

It can be written as a sum of positive squares in only one way, i.e., 15602008464 + 7964313049 = 124908^2 + 89243^2 .

It is not a de Polignac number, because 23566321513 - 2¹ = 23566321511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23566321511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240472620 + ... + 240472717.

It is an arithmetic number, because the mean of its divisors is an integer number (4568980711).

Almost surely, 2^23566321513 is an apocalyptic number.

It is an amenable number.

23566321513 is a deficient number, since it is larger than the sum of its proper divisors (3847562753).

23566321513 is an equidigital number, since it uses as much as digits as its factorization.

23566321513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480945351 (or 480945344 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The spelling of 23566321513 in words is "twenty-three billion, five hundred sixty-six million, three hundred twenty-one thousand, five hundred thirteen".