23545259557 has 2 divisors, whose sum is σ = 23545259558. Its totient is φ = 23545259556.

The previous prime is 23545259519. The next prime is 23545259561. The reversal of 23545259557 is 75595254532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13474334241 + 10070925316 = 116079^2 + 100354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23545259557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23545289557) 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, 11772629778 + 11772629779.

It is an arithmetic number, because the mean of its divisors is an integer number (11772629779).

Almost surely, 2^23545259557 is an apocalyptic number.

It is an amenable number.

23545259557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23545259557 is an equidigital number, since it uses as much as digits as its factorization.

23545259557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450000, while the sum is 52.

The spelling of 23545259557 in words is "twenty-three billion, five hundred forty-five million, two hundred fifty-nine thousand, five hundred fifty-seven".