23641145509 has 2 divisors, whose sum is σ = 23641145510. Its totient is φ = 23641145508.

The previous prime is 23641145461. The next prime is 23641145513. The reversal of 23641145509 is 90554114632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22461016900 + 1180128609 = 149870^2 + 34353^2 .

It is a cyclic number.

It is not a de Polignac number, because 23641145509 - 2²⁹ = 23104274597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23641145809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11820572754 + 11820572755.

It is an arithmetic number, because the mean of its divisors is an integer number (11820572755).

Almost surely, 2^23641145509 is an apocalyptic number.

It is an amenable number.

23641145509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23641145509 is an equidigital number, since it uses as much as digits as its factorization.

23641145509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 23641145509 in words is "twenty-three billion, six hundred forty-one million, one hundred forty-five thousand, five hundred nine".