23661645255 has 24 divisors (see below), whose sum is σ = 42796716768. Its totient is φ = 12070867776.

The previous prime is 23661645251. The next prime is 23661645257. The reversal of 23661645255 is 55254616632.

23661645255 is a `hidden beast` number, since 2 + 3 + 6 + 61 + 64 + 525 + 5 = 666.

It is not a de Polignac number, because 23661645255 - 2² = 23661645251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 23661645255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23661645251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11429712 + ... + 11431781.

It is an arithmetic number, because the mean of its divisors is an integer number (1783196532).

Almost surely, 2^23661645255 is an apocalyptic number.

23661645255 is a deficient number, since it is larger than the sum of its proper divisors (19135071513).

23661645255 is a wasteful number, since it uses less digits than its factorization.

23661645255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22861527 (or 22861524 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 23661645255 in words is "twenty-three billion, six hundred sixty-one million, six hundred forty-five thousand, two hundred fifty-five".