556464491 has 4 divisors (see below), whose sum is σ = 607052184. Its totient is φ = 505876800.

The previous prime is 556464481. The next prime is 556464523. The reversal of 556464491 is 194464655.

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

It is not a de Polignac number, because 556464491 - 2⁶ = 556464427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556464431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25293830 + ... + 25293851.

It is an arithmetic number, because the mean of its divisors is an integer number (151763046).

Almost surely, 2^556464491 is an apocalyptic number.

556464491 is a deficient number, since it is larger than the sum of its proper divisors (50587693).

556464491 is a wasteful number, since it uses less digits than its factorization.

556464491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50587692.

The product of its digits is 518400, while the sum is 44.

The square root of 556464491 is about 23589.4995919795. The cubic root of 556464491 is about 822.5187726797.

The spelling of 556464491 in words is "five hundred fifty-six million, four hundred sixty-four thousand, four hundred ninety-one".