556481678 has 4 divisors (see below), whose sum is σ = 834722520. Its totient is φ = 278240838.

The previous prime is 556481669. The next prime is 556481683. The reversal of 556481678 is 876184655.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139120418 + ... + 139120421.

It is an arithmetic number, because the mean of its divisors is an integer number (208680630).

Almost surely, 2^556481678 is an apocalyptic number.

556481678 is a deficient number, since it is larger than the sum of its proper divisors (278240842).

556481678 is a wasteful number, since it uses less digits than its factorization.

556481678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278240841.

The product of its digits is 1612800, while the sum is 50.

The square root of 556481678 is about 23589.8638826086. The cubic root of 556481678 is about 822.5272407160.

The spelling of 556481678 in words is "five hundred fifty-six million, four hundred eighty-one thousand, six hundred seventy-eight".