23665536401 has 4 divisors (see below), whose sum is σ = 25485962292. Its totient is φ = 21845110512.

The previous prime is 23665536379. The next prime is 23665536403. The reversal of 23665536401 is 10463556632.

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 1369074001 + 22296462400 = 37001^2 + 149320^2 .

It is a cyclic number.

It is not a de Polignac number, because 23665536401 - 2⁶ = 23665536337 is a prime.

It is a super-2 number, since 2×23665536401² (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 (23665536403) 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, 910212926 + ... + 910212951.

It is an arithmetic number, because the mean of its divisors is an integer number (6371490573).

Almost surely, 2^23665536401 is an apocalyptic number.

It is an amenable number.

23665536401 is a deficient number, since it is larger than the sum of its proper divisors (1820425891).

23665536401 is a wasteful number, since it uses less digits than its factorization.

23665536401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820425890.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 23665536401 in words is "twenty-three billion, six hundred sixty-five million, five hundred thirty-six thousand, four hundred one".