556386557 has 18 divisors (see below), whose sum is σ = 623901978. Its totient is φ = 496003968.

The previous prime is 556386539. The next prime is 556386617. The reversal of 556386557 is 755683655.

556386557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 420291001 + 136095556 = 20501^2 + 11666^2 .

It is not a de Polignac number, because 556386557 - 2⁸ = 556386301 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556382557) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 101663 + ... + 106995.

It is an arithmetic number, because the mean of its divisors is an integer number (34661221).

Almost surely, 2^556386557 is an apocalyptic number.

It is an amenable number.

556386557 is a deficient number, since it is larger than the sum of its proper divisors (67515421).

556386557 is a wasteful number, since it uses less digits than its factorization.

556386557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405 (or 5369 counting only the distinct ones).

The product of its digits is 3780000, while the sum is 50.

The square root of 556386557 is about 23587.8476550956. The cubic root of 556386557 is about 822.4803724033.

The spelling of 556386557 in words is "five hundred fifty-six million, three hundred eighty-six thousand, five hundred fifty-seven".