556461444221 has 4 divisors (see below), whose sum is σ = 556512984000. Its totient is φ = 556409904444.

The previous prime is 556461444211. The next prime is 556461444229. The reversal of 556461444221 is 122444164655.

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 a de Polignac number, because none of the positive numbers 2^k-556461444221 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 (556461444229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25753691 + ... + 25775288.

It is an arithmetic number, because the mean of its divisors is an integer number (139128246000).

Almost surely, 2^556461444221 is an apocalyptic number.

It is an amenable number.

556461444221 is a deficient number, since it is larger than the sum of its proper divisors (51539779).

556461444221 is a wasteful number, since it uses less digits than its factorization.

556461444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51539778.

The product of its digits is 921600, while the sum is 44.

The spelling of 556461444221 in words is "five hundred fifty-six billion, four hundred sixty-one million, four hundred forty-four thousand, two hundred twenty-one".