23117356472257 has 2 divisors, whose sum is σ = 23117356472258. Its totient is φ = 23117356472256.

The previous prime is 23117356472173. The next prime is 23117356472269. The reversal of 23117356472257 is 75227465371132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14324287145536 + 8793069326721 = 3784744^2 + 2965311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23117356472257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23117356472198 and 23117356472207.

It is not a weakly prime, because it can be changed into another prime (23117356472057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11558678236128 + 11558678236129.

It is an arithmetic number, because the mean of its divisors is an integer number (11558678236129).

Almost surely, 2^{23117356472257} is an apocalyptic number.

It is an amenable number.

23117356472257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23117356472257 is an equidigital number, since it uses as much as digits as its factorization.

23117356472257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14817600, while the sum is 55.

The spelling of 23117356472257 in words is "twenty-three trillion, one hundred seventeen billion, three hundred fifty-six million, four hundred seventy-two thousand, two hundred fifty-seven".