23964857261 has 2 divisors, whose sum is σ = 23964857262. Its totient is φ = 23964857260.

The previous prime is 23964857237. The next prime is 23964857297. The reversal of 23964857261 is 16275846932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23516222500 + 448634761 = 153350^2 + 21181^2 .

It is a cyclic number.

It is not a de Polignac number, because 23964857261 - 2⁶ = 23964857197 is a prime.

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 (23964856261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11982428630 + 11982428631.

It is an arithmetic number, because the mean of its divisors is an integer number (11982428631).

Almost surely, 2^23964857261 is an apocalyptic number.

It is an amenable number.

23964857261 is a deficient number, since it is larger than the sum of its proper divisors (1).

23964857261 is an equidigital number, since it uses as much as digits as its factorization.

23964857261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 53.

The spelling of 23964857261 in words is "twenty-three billion, nine hundred sixty-four million, eight hundred fifty-seven thousand, two hundred sixty-one".