51145631791 has 2 divisors, whose sum is σ = 51145631792. Its totient is φ = 51145631790.

The previous prime is 51145631683. The next prime is 51145631827. The reversal of 51145631791 is 19713654115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51145631791 - 2⁹ = 51145631279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51145631291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25572815895 + 25572815896.

It is an arithmetic number, because the mean of its divisors is an integer number (25572815896).

Almost surely, 2^51145631791 is an apocalyptic number.

51145631791 is a deficient number, since it is larger than the sum of its proper divisors (1).

51145631791 is an equidigital number, since it uses as much as digits as its factorization.

51145631791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 43.

The spelling of 51145631791 in words is "fifty-one billion, one hundred forty-five million, six hundred thirty-one thousand, seven hundred ninety-one".