556776243 has 12 divisors (see below), whose sum is σ = 808401880. Its totient is φ = 369259776.

The previous prime is 556776211. The next prime is 556776271. The reversal of 556776243 is 342677655.

556776243 is a `hidden beast` number, since 556 + 7 + 76 + 24 + 3 = 666.

It is not a de Polignac number, because 556776243 - 2⁵ = 556776211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556776043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158533 + ... + 162006.

Almost surely, 2^556776243 is an apocalyptic number.

556776243 is a deficient number, since it is larger than the sum of its proper divisors (251625637).

556776243 is a wasteful number, since it uses less digits than its factorization.

556776243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320738 (or 320735 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 556776243 is about 23596.1065220515. The cubic root of 556776243 is about 822.6723458221.

It can be divided in two parts, 5567 and 76243, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 556776243 in words is "five hundred fifty-six million, seven hundred seventy-six thousand, two hundred forty-three".