557457685 has 4 divisors (see below), whose sum is σ = 668949228. Its totient is φ = 445966144.

The previous prime is 557457679. The next prime is 557457709. The reversal of 557457685 is 586754755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586754755 = 5 ⋅117350951.

It can be written as a sum of positive squares in 2 ways, for example, as 149377284 + 408080401 = 12222^2 + 20201^2 .

It is a cyclic number.

It is not a de Polignac number, because 557457685 - 2¹⁹ = 556933397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55745764 + ... + 55745773.

It is an arithmetic number, because the mean of its divisors is an integer number (167237307).

Almost surely, 2^557457685 is an apocalyptic number.

It is an amenable number.

557457685 is a deficient number, since it is larger than the sum of its proper divisors (111491543).

557457685 is a wasteful number, since it uses less digits than its factorization.

557457685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111491542.

The product of its digits is 5880000, while the sum is 52.

The square root of 557457685 is about 23610.5418192806. The cubic root of 557457685 is about 823.0078336370.

The spelling of 557457685 in words is "five hundred fifty-seven million, four hundred fifty-seven thousand, six hundred eighty-five".