23091165517 has 16 divisors (see below), whose sum is σ = 27687783424. Its totient is φ = 18839952000.

The previous prime is 23091165499. The next prime is 23091165551. The reversal of 23091165517 is 71556119032.

It is a cyclic number.

It is not a de Polignac number, because 23091165517 - 2²⁷ = 22956947789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23091165517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23091165577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858984 + ... + 885457.

It is an arithmetic number, because the mean of its divisors is an integer number (1730486464).

Almost surely, 2^23091165517 is an apocalyptic number.

It is an amenable number.

23091165517 is a deficient number, since it is larger than the sum of its proper divisors (4596617907).

23091165517 is a wasteful number, since it uses less digits than its factorization.

23091165517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744540.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 23091165517 in words is "twenty-three billion, ninety-one million, one hundred sixty-five thousand, five hundred seventeen".