51775959791 has 2 divisors, whose sum is σ = 51775959792. Its totient is φ = 51775959790.

The previous prime is 51775959769. The next prime is 51775959799. The reversal of 51775959791 is 19795957715.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51775959791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51775959799) 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, 25887979895 + 25887979896.

It is an arithmetic number, because the mean of its divisors is an integer number (25887979896).

Almost surely, 2^51775959791 is an apocalyptic number.

51775959791 is a deficient number, since it is larger than the sum of its proper divisors (1).

51775959791 is an equidigital number, since it uses as much as digits as its factorization.

51775959791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31255875, while the sum is 65.

The spelling of 51775959791 in words is "fifty-one billion, seven hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred ninety-one".