23638856511533 has 2 divisors, whose sum is σ = 23638856511534. Its totient is φ = 23638856511532.

The previous prime is 23638856511511. The next prime is 23638856511757. The reversal of 23638856511533 is 33511565883632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15974745972964 + 7664110538569 = 3996842^2 + 2768413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23638856511533 is a prime.

It is a super-2 number, since 2×23638856511533² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23638856511833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11819428255766 + 11819428255767.

It is an arithmetic number, because the mean of its divisors is an integer number (11819428255767).

Almost surely, 2^{23638856511533} is an apocalyptic number.

It is an amenable number.

23638856511533 is a deficient number, since it is larger than the sum of its proper divisors (1).

23638856511533 is an equidigital number, since it uses as much as digits as its factorization.

23638856511533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656000, while the sum is 59.

The spelling of 23638856511533 in words is "twenty-three trillion, six hundred thirty-eight billion, eight hundred fifty-six million, five hundred eleven thousand, five hundred thirty-three".