556271865 has 48 divisors (see below), whose sum is σ = 1000771200. Its totient is φ = 285626880.

The previous prime is 556271861. The next prime is 556271867. The reversal of 556271865 is 568172655.

556271865 is a `hidden beast` number, since 5 + 5 + 627 + 18 + 6 + 5 = 666.

It is not a de Polignac number, because 556271865 - 2² = 556271861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 556271865.

It is not an unprimeable number, because it can be changed into a prime (556271861) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 135361 + ... + 139409.

It is an arithmetic number, because the mean of its divisors is an integer number (20849400).

Almost surely, 2^556271865 is an apocalyptic number.

It is an amenable number.

556271865 is a deficient number, since it is larger than the sum of its proper divisors (444499335).

556271865 is a wasteful number, since it uses less digits than its factorization.

556271865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174 (or 4171 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 556271865 is about 23585.4163626594. The cubic root of 556271865 is about 822.4238539030.

The spelling of 556271865 in words is "five hundred fifty-six million, two hundred seventy-one thousand, eight hundred sixty-five".