556400553 has 4 divisors (see below), whose sum is σ = 741867408. Its totient is φ = 370933700.

The previous prime is 556400549. The next prime is 556400563. The reversal of 556400553 is 355004655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 556400553 - 2² = 556400549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556400563) 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 3 ways as a sum of consecutive naturals, for example, 92733423 + ... + 92733428.

It is an arithmetic number, because the mean of its divisors is an integer number (185466852).

Almost surely, 2^556400553 is an apocalyptic number.

It is an amenable number.

556400553 is a deficient number, since it is larger than the sum of its proper divisors (185466855).

556400553 is a wasteful number, since it uses less digits than its factorization.

556400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185466854.

The product of its (nonzero) digits is 45000, while the sum is 33.

The square root of 556400553 is about 23588.1443314221. The cubic root of 556400553 is about 822.4872688907.

The spelling of 556400553 in words is "five hundred fifty-six million, four hundred thousand, five hundred fifty-three".