555580555421 has 2 divisors, whose sum is σ = 555580555422. Its totient is φ = 555580555420.

The previous prime is 555580555367. The next prime is 555580555427. The reversal of 555580555421 is 124555085555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480545649796 + 75034905625 = 693214^2 + 273925^2 .

It is a cyclic number.

It is not a de Polignac number, because 555580555421 - 2⁶ = 555580555357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 555580555421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555580555427) 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 as a sum of consecutive naturals, namely, 277790277710 + 277790277711.

It is an arithmetic number, because the mean of its divisors is an integer number (277790277711).

Almost surely, 2^555580555421 is an apocalyptic number.

It is an amenable number.

555580555421 is a deficient number, since it is larger than the sum of its proper divisors (1).

555580555421 is an equidigital number, since it uses as much as digits as its factorization.

555580555421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000000, while the sum is 50.

The spelling of 555580555421 in words is "five hundred fifty-five billion, five hundred eighty million, five hundred fifty-five thousand, four hundred twenty-one".