556611639 has 8 divisors (see below), whose sum is σ = 743469312. Its totient is φ = 370414200.

The previous prime is 556611623. The next prime is 556611673. The reversal of 556611639 is 936116655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556611639 - 2⁴ = 556611623 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 556611639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556611619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163087 + ... + 166464.

It is an arithmetic number, because the mean of its divisors is an integer number (92933664).

Almost surely, 2^556611639 is an apocalyptic number.

556611639 is a deficient number, since it is larger than the sum of its proper divisors (186857673).

556611639 is a wasteful number, since it uses less digits than its factorization.

556611639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330117.

The product of its digits is 145800, while the sum is 42.

The square root of 556611639 is about 23592.6183159055. The cubic root of 556611639 is about 822.5912668685.

It can be divided in two parts, 5566 and 11639, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 556611639 in words is "five hundred fifty-six million, six hundred eleven thousand, six hundred thirty-nine".