557889681 has 4 divisors (see below), whose sum is σ = 743852912. Its totient is φ = 371926452.

The previous prime is 557889677. The next prime is 557889707. The reversal of 557889681 is 186988755.

It is a happy number.

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 not a de Polignac number, because 557889681 - 2² = 557889677 is a prime.

It is a super-2 number, since 2×557889681² = 622481792332563522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557889601) 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, 92981611 + ... + 92981616.

It is an arithmetic number, because the mean of its divisors is an integer number (185963228).

Almost surely, 2^557889681 is an apocalyptic number.

It is an amenable number.

557889681 is a deficient number, since it is larger than the sum of its proper divisors (185963231).

557889681 is a wasteful number, since it uses less digits than its factorization.

557889681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185963230.

The product of its digits is 4838400, while the sum is 57.

The square root of 557889681 is about 23619.6884187747. The cubic root of 557889681 is about 823.2203725145.

It can be divided in two parts, 5578 and 89681, that added together give a palindrome (95259).

The spelling of 557889681 in words is "five hundred fifty-seven million, eight hundred eighty-nine thousand, six hundred eighty-one".