23663664161 has 4 divisors (see below), whose sum is σ = 23664216900. Its totient is φ = 23663111424.

The previous prime is 23663664119. The next prime is 23663664169. The reversal of 23663664161 is 16146636632.

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 2308225936 + 21355438225 = 48044^2 + 146135^2 .

It is a cyclic number.

It is not a de Polignac number, because 23663664161 - 2¹⁸ = 23663402017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663664169) 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, 206216 + ... + 299753.

It is an arithmetic number, because the mean of its divisors is an integer number (5916054225).

Almost surely, 2^23663664161 is an apocalyptic number.

It is an amenable number.

23663664161 is a deficient number, since it is larger than the sum of its proper divisors (552739).

23663664161 is an equidigital number, since it uses as much as digits as its factorization.

23663664161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552738.

The product of its digits is 559872, while the sum is 44.

The spelling of 23663664161 in words is "twenty-three billion, six hundred sixty-three million, six hundred sixty-four thousand, one hundred sixty-one".