23635338557 has 2 divisors, whose sum is σ = 23635338558. Its totient is φ = 23635338556.

The previous prime is 23635338547. The next prime is 23635338563. The reversal of 23635338557 is 75583353632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20670100441 + 2965238116 = 143771^2 + 54454^2 .

It is a cyclic number.

It is not a de Polignac number, because 23635338557 - 2⁴ = 23635338541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23635338547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11817669278 + 11817669279.

It is an arithmetic number, because the mean of its divisors is an integer number (11817669279).

Almost surely, 2^23635338557 is an apocalyptic number.

It is an amenable number.

23635338557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23635338557 is an equidigital number, since it uses as much as digits as its factorization.

23635338557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 50.

The spelling of 23635338557 in words is "twenty-three billion, six hundred thirty-five million, three hundred thirty-eight thousand, five hundred fifty-seven".