557939991 has 8 divisors (see below), whose sum is σ = 850194304. Its totient is φ = 318822840.

The previous prime is 557939989. The next prime is 557940067. The reversal of 557939991 is 199939755.

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

It is not a de Polignac number, because 557939991 - 2¹ = 557939989 is a prime.

It is a super-2 number, since 2×557939991² = 622594067114160162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557934991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13284265 + ... + 13284306.

It is an arithmetic number, because the mean of its divisors is an integer number (106274288).

Almost surely, 2^557939991 is an apocalyptic number.

557939991 is a deficient number, since it is larger than the sum of its proper divisors (292254313).

557939991 is a wasteful number, since it uses less digits than its factorization.

557939991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26568581.

The product of its digits is 3444525, while the sum is 57.

The square root of 557939991 is about 23620.7533961133. The cubic root of 557939991 is about 823.2451175334.

The spelling of 557939991 in words is "five hundred fifty-seven million, nine hundred thirty-nine thousand, nine hundred ninety-one".