23257976549 has 2 divisors, whose sum is σ = 23257976550. Its totient is φ = 23257976548.

The previous prime is 23257976537. The next prime is 23257976603. The reversal of 23257976549 is 94567975232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17887725025 + 5370251524 = 133745^2 + 73282^2 .

It is a cyclic number.

It is not a de Polignac number, because 23257976549 - 2¹⁶ = 23257911013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23257976509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11628988274 + 11628988275.

It is an arithmetic number, because the mean of its divisors is an integer number (11628988275).

Almost surely, 2^23257976549 is an apocalyptic number.

It is an amenable number.

23257976549 is a deficient number, since it is larger than the sum of its proper divisors (1).

23257976549 is an equidigital number, since it uses as much as digits as its factorization.

23257976549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28576800, while the sum is 59.

The spelling of 23257976549 in words is "twenty-three billion, two hundred fifty-seven million, nine hundred seventy-six thousand, five hundred forty-nine".