23138643599 has 2 divisors, whose sum is σ = 23138643600. Its totient is φ = 23138643598.

The previous prime is 23138643587. The next prime is 23138643623. The reversal of 23138643599 is 99534683132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23138643599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23138643599.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23138643559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11569321799 + 11569321800.

It is an arithmetic number, because the mean of its divisors is an integer number (11569321800).

Almost surely, 2^23138643599 is an apocalyptic number.

23138643599 is a deficient number, since it is larger than the sum of its proper divisors (1).

23138643599 is an equidigital number, since it uses as much as digits as its factorization.

23138643599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 53.

The spelling of 23138643599 in words is "twenty-three billion, one hundred thirty-eight million, six hundred forty-three thousand, five hundred ninety-nine".