556673391 has 24 divisors (see below), whose sum is σ = 835655184. Its totient is φ = 370319040.

The previous prime is 556673371. The next prime is 556673401. The reversal of 556673391 is 193376655.

556673391 is a `hidden beast` number, since 556 + 6 + 7 + 3 + 3 + 91 = 666.

556673391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 556673391 - 2¹¹ = 556671343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556673321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124405 + ... + 128801.

It is an arithmetic number, because the mean of its divisors is an integer number (34818966).

Almost surely, 2^556673391 is an apocalyptic number.

556673391 is a deficient number, since it is larger than the sum of its proper divisors (278981793).

556673391 is an equidigital number, since it uses as much as digits as its factorization.

556673391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933 (or 4921 counting only the distinct ones).

The product of its digits is 510300, while the sum is 45.

The square root of 556673391 is about 23593.9269940381. The cubic root of 556673391 is about 822.6216859099.

The spelling of 556673391 in words is "five hundred fifty-six million, six hundred seventy-three thousand, three hundred ninety-one".