23745572155 has 4 divisors (see below), whose sum is σ = 28494686592. Its totient is φ = 18996457720.

The previous prime is 23745572153. The next prime is 23745572159. The reversal of 23745572155 is 55127554732.

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

It is not a de Polignac number, because 23745572155 - 2¹ = 23745572153 is a prime.

It is a super-2 number, since 2×23745572155² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23745572153) 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 3 ways as a sum of consecutive naturals, for example, 2374557211 + ... + 2374557220.

It is an arithmetic number, because the mean of its divisors is an integer number (7123671648).

Almost surely, 2^23745572155 is an apocalyptic number.

23745572155 is a deficient number, since it is larger than the sum of its proper divisors (4749114437).

23745572155 is an equidigital number, since it uses as much as digits as its factorization.

23745572155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749114436.

The product of its digits is 1470000, while the sum is 46.

The spelling of 23745572155 in words is "twenty-three billion, seven hundred forty-five million, five hundred seventy-two thousand, one hundred fifty-five".