23911532657 has 2 divisors, whose sum is σ = 23911532658. Its totient is φ = 23911532656.

The previous prime is 23911532647. The next prime is 23911532663. The reversal of 23911532657 is 75623511932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23865306256 + 46226401 = 154484^2 + 6799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23911532657 is a prime.

It is a super-2 number, since 2×23911532657² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23911532647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11955766328 + 11955766329.

It is an arithmetic number, because the mean of its divisors is an integer number (11955766329).

Almost surely, 2^23911532657 is an apocalyptic number.

It is an amenable number.

23911532657 is a deficient number, since it is larger than the sum of its proper divisors (1).

23911532657 is an equidigital number, since it uses as much as digits as its factorization.

23911532657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 44.

The spelling of 23911532657 in words is "twenty-three billion, nine hundred eleven million, five hundred thirty-two thousand, six hundred fifty-seven".