23551256761 has 4 divisors (see below), whose sum is σ = 24187777252. Its totient is φ = 22914736272.

The previous prime is 23551256759. The next prime is 23551256767. The reversal of 23551256761 is 16765215532.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9385734400 + 14165522361 = 96880^2 + 119019^2 .

It is a cyclic number.

It is not a de Polignac number, because 23551256761 - 2¹ = 23551256759 is a prime.

It is a super-2 number, since 2×23551256761² (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 (23551256767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318260190 + ... + 318260263.

It is an arithmetic number, because the mean of its divisors is an integer number (6046944313).

Almost surely, 2^23551256761 is an apocalyptic number.

It is an amenable number.

23551256761 is a deficient number, since it is larger than the sum of its proper divisors (636520491).

23551256761 is an equidigital number, since it uses as much as digits as its factorization.

23551256761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636520490.

The product of its digits is 378000, while the sum is 43.

The spelling of 23551256761 in words is "twenty-three billion, five hundred fifty-one million, two hundred fifty-six thousand, seven hundred sixty-one".