51086123738197 has 2 divisors, whose sum is σ = 51086123738198. Its totient is φ = 51086123738196.

The previous prime is 51086123738099. The next prime is 51086123738207. The reversal of 51086123738197 is 79183732168015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43020927013156 + 8065196725041 = 6559034^2 + 2839929^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086123738197 - 2³⁹ = 50536367924309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51086123732197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543061869098 + 25543061869099.

It is an arithmetic number, because the mean of its divisors is an integer number (25543061869099).

Almost surely, 2^{51086123738197} is an apocalyptic number.

It is an amenable number.

51086123738197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086123738197 is an equidigital number, since it uses as much as digits as its factorization.

51086123738197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 51086123738197 in words is "fifty-one trillion, eighty-six billion, one hundred twenty-three million, seven hundred thirty-eight thousand, one hundred ninety-seven".