556405985803 has 4 divisors (see below), whose sum is σ = 560090793808. Its totient is φ = 552721177800.

The previous prime is 556405985767. The next prime is 556405985809. The reversal of 556405985803 is 308589504655.

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 556405985803 - 2¹⁷ = 556405854731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556405985809) 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, 1842403776 + ... + 1842404077.

It is an arithmetic number, because the mean of its divisors is an integer number (140022698452).

Almost surely, 2^556405985803 is an apocalyptic number.

556405985803 is a deficient number, since it is larger than the sum of its proper divisors (3684808005).

556405985803 is a wasteful number, since it uses less digits than its factorization.

556405985803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684808004.

The product of its (nonzero) digits is 25920000, while the sum is 58.

The spelling of 556405985803 in words is "five hundred fifty-six billion, four hundred five million, nine hundred eighty-five thousand, eight hundred three".