23155869713981 has 2 divisors, whose sum is σ = 23155869713982. Its totient is φ = 23155869713980.

The previous prime is 23155869713959. The next prime is 23155869714071. The reversal of 23155869713981 is 18931796855132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20054364804100 + 3101504909881 = 4478210^2 + 1761109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23155869713981 is a prime.

It is a super-2 number, since 2×23155869713981² (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 (23155869713281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577934856990 + 11577934856991.

It is an arithmetic number, because the mean of its divisors is an integer number (11577934856991).

Almost surely, 2^{23155869713981} is an apocalyptic number.

It is an amenable number.

23155869713981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23155869713981 is an equidigital number, since it uses as much as digits as its factorization.

23155869713981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97977600, while the sum is 68.

The spelling of 23155869713981 in words is "twenty-three trillion, one hundred fifty-five billion, eight hundred sixty-nine million, seven hundred thirteen thousand, nine hundred eighty-one".