23151888261 has 10 divisors (see below), whose sum is σ = 34584919622. Its totient is φ = 15434592120.

The previous prime is 23151888239. The next prime is 23151888281. The reversal of 23151888261 is 16288815132.

23151888261 is a `hidden beast` number, since 2 + 31 + 518 + 88 + 26 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20671250625 + 2480637636 = 143775^2 + 49806^2 .

It is not a de Polignac number, because 23151888261 - 2¹⁰ = 23151887237 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 (23151888281) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 142912810 + ... + 142912971.

Almost surely, 2^23151888261 is an apocalyptic number.

It is an amenable number.

23151888261 is a deficient number, since it is larger than the sum of its proper divisors (11433031361).

23151888261 is an equidigital number, since it uses as much as digits as its factorization.

23151888261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285825793 (or 285825784 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The spelling of 23151888261 in words is "twenty-three billion, one hundred fifty-one million, eight hundred eighty-eight thousand, two hundred sixty-one".