23568918661 has 4 divisors (see below), whose sum is σ = 23616921024. Its totient is φ = 23520916300.

The previous prime is 23568918601. The next prime is 23568918691. The reversal of 23568918661 is 16681986532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23568918661 - 2⁷ = 23568918533 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 (23568918601) 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, 24000445 + ... + 24001426.

It is an arithmetic number, because the mean of its divisors is an integer number (5904230256).

Almost surely, 2^23568918661 is an apocalyptic number.

It is an amenable number.

23568918661 is a deficient number, since it is larger than the sum of its proper divisors (48002363).

23568918661 is an equidigital number, since it uses as much as digits as its factorization.

23568918661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48002362.

The product of its digits is 3732480, while the sum is 55.

The spelling of 23568918661 in words is "twenty-three billion, five hundred sixty-eight million, nine hundred eighteen thousand, six hundred sixty-one".