557799972161 has 2 divisors, whose sum is σ = 557799972162. Its totient is φ = 557799972160.

The previous prime is 557799972127. The next prime is 557799972193. The reversal of 557799972161 is 161279997755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452787681025 + 105012291136 = 672895^2 + 324056^2 .

It is a cyclic number.

It is not a de Polignac number, because 557799972161 - 2¹⁰ = 557799971137 is a prime.

It is a super-2 number, since 2×557799972161² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 557799972091 and 557799972100.

It is not a weakly prime, because it can be changed into another prime (557799972361) 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, 278899986080 + 278899986081.

It is an arithmetic number, because the mean of its divisors is an integer number (278899986081).

Almost surely, 2^557799972161 is an apocalyptic number.

It is an amenable number.

557799972161 is a deficient number, since it is larger than the sum of its proper divisors (1).

557799972161 is an equidigital number, since it uses as much as digits as its factorization.

557799972161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75014100, while the sum is 68.

The spelling of 557799972161 in words is "five hundred fifty-seven billion, seven hundred ninety-nine million, nine hundred seventy-two thousand, one hundred sixty-one".