23572565161 has 2 divisors, whose sum is σ = 23572565162. Its totient is φ = 23572565160.

The previous prime is 23572565141. The next prime is 23572565171. The reversal of 23572565161 is 16156527532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13886265600 + 9686299561 = 117840^2 + 98419^2 .

It is a cyclic number.

It is not a de Polignac number, because 23572565161 - 2¹⁷ = 23572434089 is a prime.

It is not a weakly prime, because it can be changed into another prime (23572565111) 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, 11786282580 + 11786282581.

It is an arithmetic number, because the mean of its divisors is an integer number (11786282581).

Almost surely, 2^23572565161 is an apocalyptic number.

It is an amenable number.

23572565161 is a deficient number, since it is larger than the sum of its proper divisors (1).

23572565161 is an equidigital number, since it uses as much as digits as its factorization.

23572565161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 43.

The spelling of 23572565161 in words is "twenty-three billion, five hundred seventy-two million, five hundred sixty-five thousand, one hundred sixty-one".