557773561 has 2 divisors, whose sum is σ = 557773562. Its totient is φ = 557773560.

The previous prime is 557773543. The next prime is 557773577. The reversal of 557773561 is 165377755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394419600 + 163353961 = 19860^2 + 12781^2 .

It is a cyclic number.

It is not a de Polignac number, because 557773561 - 2¹⁷ = 557642489 is a prime.

It is a super-2 number, since 2×557773561² = 622222690701241442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (557773361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278886780 + 278886781.

It is an arithmetic number, because the mean of its divisors is an integer number (278886781).

Almost surely, 2^557773561 is an apocalyptic number.

It is an amenable number.

557773561 is a deficient number, since it is larger than the sum of its proper divisors (1).

557773561 is an equidigital number, since it uses as much as digits as its factorization.

557773561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 771750, while the sum is 46.

The square root of 557773561 is about 23617.2301720587. The cubic root of 557773561 is about 823.1632531079.

The spelling of 557773561 in words is "five hundred fifty-seven million, seven hundred seventy-three thousand, five hundred sixty-one".