556605440461 has 4 divisors (see below), whose sum is σ = 636120503392. Its totient is φ = 477090377532.

The previous prime is 556605440459. The next prime is 556605440497. The reversal of 556605440461 is 164044506655.

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 556605440461 - 2¹ = 556605440459 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 (556605440431) 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, 39757531455 + ... + 39757531468.

It is an arithmetic number, because the mean of its divisors is an integer number (159030125848).

Almost surely, 2^556605440461 is an apocalyptic number.

It is an amenable number.

556605440461 is a deficient number, since it is larger than the sum of its proper divisors (79515062931).

556605440461 is an equidigital number, since it uses as much as digits as its factorization.

556605440461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79515062930.

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 556605440461 in words is "five hundred fifty-six billion, six hundred five million, four hundred forty thousand, four hundred sixty-one".