55558426613 has 2 divisors, whose sum is σ = 55558426614. Its totient is φ = 55558426612.

The previous prime is 55558426591. The next prime is 55558426633. The reversal of 55558426613 is 31662485555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52265732689 + 3292693924 = 228617^2 + 57382^2 .

It is a cyclic number.

It is not a de Polignac number, because 55558426613 - 2¹⁶ = 55558361077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55558426633) 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 as a sum of consecutive naturals, namely, 27779213306 + 27779213307.

It is an arithmetic number, because the mean of its divisors is an integer number (27779213307).

Almost surely, 2^55558426613 is an apocalyptic number.

It is an amenable number.

55558426613 is a deficient number, since it is larger than the sum of its proper divisors (1).

55558426613 is an equidigital number, since it uses as much as digits as its factorization.

55558426613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320000, while the sum is 50.

The spelling of 55558426613 in words is "fifty-five billion, five hundred fifty-eight million, four hundred twenty-six thousand, six hundred thirteen".