51055555591 has 2 divisors, whose sum is σ = 51055555592. Its totient is φ = 51055555590.

The previous prime is 51055555559. The next prime is 51055555601. The reversal of 51055555591 is 19555555015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51055555591 - 2⁵ = 51055555559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51055555531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527777795 + 25527777796.

It is an arithmetic number, because the mean of its divisors is an integer number (25527777796).

Almost surely, 2^51055555591 is an apocalyptic number.

51055555591 is a deficient number, since it is larger than the sum of its proper divisors (1).

51055555591 is an equidigital number, since it uses as much as digits as its factorization.

51055555591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 703125, while the sum is 46.

The spelling of 51055555591 in words is "fifty-one billion, fifty-five million, five hundred fifty-five thousand, five hundred ninety-one".