51517196677 has 2 divisors, whose sum is σ = 51517196678. Its totient is φ = 51517196676.

The previous prime is 51517196659. The next prime is 51517196693. The reversal of 51517196677 is 77669171515.

It is a Cunningham number, because it is equal to 226974²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51517196676 + 1 = 226974^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 51517196677 - 2¹⁵ = 51517163909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51517196477) 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, 25758598338 + 25758598339.

It is an arithmetic number, because the mean of its divisors is an integer number (25758598339).

Almost surely, 2^51517196677 is an apocalyptic number.

51517196677 is the 131044-th hex number.

It is an amenable number.

51517196677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51517196677 is an equidigital number, since it uses as much as digits as its factorization.

51517196677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2778300, while the sum is 55.

The spelling of 51517196677 in words is "fifty-one billion, five hundred seventeen million, one hundred ninety-six thousand, six hundred seventy-seven".