23957940565 has 16 divisors (see below), whose sum is σ = 30974622336. Its totient is φ = 17684251200.

The previous prime is 23957940529. The next prime is 23957940571. The reversal of 23957940565 is 56504975932.

It is not a de Polignac number, because 23957940565 - 2²⁹ = 23421069653 is a prime.

It is a super-2 number, since 2×23957940565² (a number of 22 digits) contains 22 as substring.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70470 + ... + 229960.

It is an arithmetic number, because the mean of its divisors is an integer number (1935913896).

Almost surely, 2^23957940565 is an apocalyptic number.

It is an amenable number.

23957940565 is a deficient number, since it is larger than the sum of its proper divisors (7016681771).

23957940565 is a wasteful number, since it uses less digits than its factorization.

23957940565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161820.

The product of its (nonzero) digits is 10206000, while the sum is 55.

The spelling of 23957940565 in words is "twenty-three billion, nine hundred fifty-seven million, nine hundred forty thousand, five hundred sixty-five".