23236143561 has 12 divisors (see below), whose sum is σ = 33871240260. Its totient is φ = 15348644640.

The previous prime is 23236143509. The next prime is 23236143563. The reversal of 23236143561 is 16534163232.

23236143561 is a `hidden beast` number, since 2 + 3 + 2 + 3 + 614 + 35 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20950825536 + 2285318025 = 144744^2 + 47805^2 .

It is not a de Polignac number, because 23236143561 - 2¹⁰ = 23236142537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23236143563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11842110 + ... + 11844071.

It is an arithmetic number, because the mean of its divisors is an integer number (2822603355).

Almost surely, 2^23236143561 is an apocalyptic number.

It is an amenable number.

23236143561 is a deficient number, since it is larger than the sum of its proper divisors (10635096699).

23236143561 is a wasteful number, since it uses less digits than its factorization.

23236143561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23686296 (or 23686293 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 23236143561 in words is "twenty-three billion, two hundred thirty-six million, one hundred forty-three thousand, five hundred sixty-one".