23545573999 has 4 divisors (see below), whose sum is σ = 23547733864. Its totient is φ = 23543414136.

The previous prime is 23545573993. The next prime is 23545574009. The reversal of 23545573999 is 99937554532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23545573999 - 2²⁵ = 23512019567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23545573993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063497 + ... + 1085410.

It is an arithmetic number, because the mean of its divisors is an integer number (5886933466).

Almost surely, 2^23545573999 is an apocalyptic number.

23545573999 is a deficient number, since it is larger than the sum of its proper divisors (2159865).

23545573999 is a wasteful number, since it uses less digits than its factorization.

23545573999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159864.

The product of its digits is 45927000, while the sum is 61.

The spelling of 23545573999 in words is "twenty-three billion, five hundred forty-five million, five hundred seventy-three thousand, nine hundred ninety-nine".