23138643559 has 2 divisors, whose sum is σ = 23138643560. Its totient is φ = 23138643558.

The previous prime is 23138643503. The next prime is 23138643587. The reversal of 23138643559 is 95534683132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23138643559 - 2¹⁵ = 23138610791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23138643599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11569321779 + 11569321780.

It is an arithmetic number, because the mean of its divisors is an integer number (11569321780).

Almost surely, 2^23138643559 is an apocalyptic number.

23138643559 is a deficient number, since it is larger than the sum of its proper divisors (1).

23138643559 is an equidigital number, since it uses as much as digits as its factorization.

23138643559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 49.

The spelling of 23138643559 in words is "twenty-three billion, one hundred thirty-eight million, six hundred forty-three thousand, five hundred fifty-nine".