555056056021 has 2 divisors, whose sum is σ = 555056056022. Its totient is φ = 555056056020.

The previous prime is 555056056013. The next prime is 555056056031. The reversal of 555056056021 is 120650650555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448397640625 + 106658415396 = 669625^2 + 326586^2 .

It is a cyclic number.

It is not a de Polignac number, because 555056056021 - 2³ = 555056056013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555056056001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277528028010 + 277528028011.

It is an arithmetic number, because the mean of its divisors is an integer number (277528028011).

Almost surely, 2^555056056021 is an apocalyptic number.

It is an amenable number.

555056056021 is a deficient number, since it is larger than the sum of its proper divisors (1).

555056056021 is an equidigital number, since it uses as much as digits as its factorization.

555056056021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 555056056021 in words is "five hundred fifty-five billion, fifty-six million, fifty-six thousand, twenty-one".