557761081 has 4 divisors (see below), whose sum is σ = 558329472. Its totient is φ = 557192692.

The previous prime is 557761073. The next prime is 557761097. The reversal of 557761081 is 180167755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 557761081 - 2³ = 557761073 is a prime.

It is a super-2 number, since 2×557761081² = 622194846956577122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557761481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282721 + ... + 284686.

It is an arithmetic number, because the mean of its divisors is an integer number (139582368).

Almost surely, 2^557761081 is an apocalyptic number.

It is an amenable number.

557761081 is a deficient number, since it is larger than the sum of its proper divisors (568391).

557761081 is an equidigital number, since it uses as much as digits as its factorization.

557761081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568390.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 557761081 is about 23616.9659567016. The cubic root of 557761081 is about 823.1571137264.

The spelling of 557761081 in words is "five hundred fifty-seven million, seven hundred sixty-one thousand, eighty-one".