55505050205551 has 2 divisors, whose sum is σ = 55505050205552. Its totient is φ = 55505050205550.

The previous prime is 55505050205461. The next prime is 55505050205557. The reversal of 55505050205551 is 15550205050555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55505050205551 - 2¹¹ = 55505050203503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55505050205498 and 55505050205507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55505050205557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752525102775 + 27752525102776.

It is an arithmetic number, because the mean of its divisors is an integer number (27752525102776).

Almost surely, 2^{55505050205551} is an apocalyptic number.

55505050205551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505050205551 is an equidigital number, since it uses as much as digits as its factorization.

55505050205551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 781250, while the sum is 43.

The spelling of 55505050205551 in words is "fifty-five trillion, five hundred five billion, fifty million, two hundred five thousand, five hundred fifty-one".