23642520615601 has 2 divisors, whose sum is σ = 23642520615602. Its totient is φ = 23642520615600.

The previous prime is 23642520615599. The next prime is 23642520615607. The reversal of 23642520615601 is 10651602524632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20781280705201 + 2861239910400 = 4558649^2 + 1691520^2 .

It is a cyclic number.

It is not a de Polignac number, because 23642520615601 - 2¹ = 23642520615599 is a prime.

Together with 23642520615599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23642520615607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821260307800 + 11821260307801.

It is an arithmetic number, because the mean of its divisors is an integer number (11821260307801).

Almost surely, 2^{23642520615601} is an apocalyptic number.

It is an amenable number.

23642520615601 is a deficient number, since it is larger than the sum of its proper divisors (1).

23642520615601 is an equidigital number, since it uses as much as digits as its factorization.

23642520615601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 23642520615601 in words is "twenty-three trillion, six hundred forty-two billion, five hundred twenty million, six hundred fifteen thousand, six hundred one".