51554261567 has 2 divisors, whose sum is σ = 51554261568. Its totient is φ = 51554261566.

The previous prime is 51554261497. The next prime is 51554261579. The reversal of 51554261567 is 76516245515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51554261567 - 2³⁰ = 50480519743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51554261587) 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, 25777130783 + 25777130784.

It is an arithmetic number, because the mean of its divisors is an integer number (25777130784).

Almost surely, 2^51554261567 is an apocalyptic number.

51554261567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51554261567 is an equidigital number, since it uses as much as digits as its factorization.

51554261567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260000, while the sum is 47.

The spelling of 51554261567 in words is "fifty-one billion, five hundred fifty-four million, two hundred sixty-one thousand, five hundred sixty-seven".