557825691 has 4 divisors (see below), whose sum is σ = 743767592. Its totient is φ = 371883792.

The previous prime is 557825651. The next prime is 557825699. The reversal of 557825691 is 196528755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 557825691 - 2¹⁵ = 557792923 is a prime.

It is a super-2 number, since 2×557825691² = 622339003079254962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 557825691.

It is not an unprimeable number, because it can be changed into a prime (557825699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92970946 + ... + 92970951.

It is an arithmetic number, because the mean of its divisors is an integer number (185941898).

Almost surely, 2^557825691 is an apocalyptic number.

557825691 is a deficient number, since it is larger than the sum of its proper divisors (185941901).

557825691 is a wasteful number, since it uses less digits than its factorization.

557825691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185941900.

The product of its digits is 756000, while the sum is 48.

The square root of 557825691 is about 23618.3337896643. Note that the first 3 decimals coincide. The cubic root of 557825691 is about 823.1888968258.

The spelling of 557825691 in words is "five hundred fifty-seven million, eight hundred twenty-five thousand, six hundred ninety-one".