557767857 has 16 divisors (see below), whose sum is σ = 784928000. Its totient is φ = 351331344.

The previous prime is 557767853. The next prime is 557767867. The reversal of 557767857 is 758767755.

It is not a de Polignac number, because 557767857 - 2² = 557767853 is a prime.

It is a super-2 number, since 2×557767857² = 622209964604744898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 557767797 and 557767806.

It is not an unprimeable number, because it can be changed into a prime (557767853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8694 + ... + 34512.

It is an arithmetic number, because the mean of its divisors is an integer number (49058000).

Almost surely, 2^557767857 is an apocalyptic number.

557767857 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

557767857 is a deficient number, since it is larger than the sum of its proper divisors (227160143).

557767857 is a wasteful number, since it uses less digits than its factorization.

557767857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220.

The product of its digits is 14406000, while the sum is 57.

The square root of 557767857 is about 23617.1094124577. The cubic root of 557767857 is about 823.1604471071.

The spelling of 557767857 in words is "five hundred fifty-seven million, seven hundred sixty-seven thousand, eight hundred fifty-seven".