557408491 has 8 divisors (see below), whose sum is σ = 588434000. Its totient is φ = 526551840.

The previous prime is 557408483. The next prime is 557408521. The reversal of 557408491 is 194804755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 557408491 - 2³ = 557408483 is a prime.

It is the 23610-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557408471) by changing a digit.

It is a nontrivial repunit in base 23609.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35400 + ... + 48661.

It is an arithmetic number, because the mean of its divisors is an integer number (73554250).

Almost surely, 2^557408491 is an apocalyptic number.

557408491 is a deficient number, since it is larger than the sum of its proper divisors (31025509).

557408491 is a wasteful number, since it uses less digits than its factorization.

557408491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84429.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 557408491 is about 23609.5000158834. The cubic root of 557408491 is about 822.9836235851.

The spelling of 557408491 in words is "five hundred fifty-seven million, four hundred eight thousand, four hundred ninety-one".