556048991 has 4 divisors (see below), whose sum is σ = 557026800. Its totient is φ = 555071184.

The previous prime is 556048979. The next prime is 556049059. The reversal of 556048991 is 199840655.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 556048991 - 2¹⁰ = 556047967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556048951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488051 + ... + 489188.

It is an arithmetic number, because the mean of its divisors is an integer number (139256700).

Almost surely, 2^556048991 is an apocalyptic number.

556048991 is a deficient number, since it is larger than the sum of its proper divisors (977809).

556048991 is an equidigital number, since it uses as much as digits as its factorization.

556048991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977808.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 556048991 is about 23580.6910628166. The cubic root of 556048991 is about 822.3140027129.

The spelling of 556048991 in words is "five hundred fifty-six million, forty-eight thousand, nine hundred ninety-one".