51393986177 has 2 divisors, whose sum is σ = 51393986178. Its totient is φ = 51393986176.

The previous prime is 51393986107. The next prime is 51393986201. The reversal of 51393986177 is 77168939315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40842793216 + 10551192961 = 202096^2 + 102719^2 .

It is a cyclic number.

It is not a de Polignac number, because 51393986177 - 2¹⁸ = 51393724033 is a prime.

It is not a weakly prime, because it can be changed into another prime (51393986107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25696993088 + 25696993089.

It is an arithmetic number, because the mean of its divisors is an integer number (25696993089).

Almost surely, 2^51393986177 is an apocalyptic number.

It is an amenable number.

51393986177 is a deficient number, since it is larger than the sum of its proper divisors (1).

51393986177 is an equidigital number, since it uses as much as digits as its factorization.

51393986177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 59.

The spelling of 51393986177 in words is "fifty-one billion, three hundred ninety-three million, nine hundred eighty-six thousand, one hundred seventy-seven".