23201266740557 has 2 divisors, whose sum is σ = 23201266740558. Its totient is φ = 23201266740556.

The previous prime is 23201266740433. The next prime is 23201266740599. The reversal of 23201266740557 is 75504766210232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22821458306761 + 379808433796 = 4777181^2 + 616286^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201266740557 - 2¹⁸ = 23201266478413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201266740257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600633370278 + 11600633370279.

It is an arithmetic number, because the mean of its divisors is an integer number (11600633370279).

Almost surely, 2^{23201266740557} is an apocalyptic number.

It is an amenable number.

23201266740557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201266740557 is an equidigital number, since it uses as much as digits as its factorization.

23201266740557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 23201266740557 in words is "twenty-three trillion, two hundred one billion, two hundred sixty-six million, seven hundred forty thousand, five hundred fifty-seven".