51761162591 has 2 divisors, whose sum is σ = 51761162592. Its totient is φ = 51761162590.

The previous prime is 51761162507. The next prime is 51761162627. The reversal of 51761162591 is 19526116715.

51761162591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51761162591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51761182591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25880581295 + 25880581296.

It is an arithmetic number, because the mean of its divisors is an integer number (25880581296).

Almost surely, 2^51761162591 is an apocalyptic number.

51761162591 is a deficient number, since it is larger than the sum of its proper divisors (1).

51761162591 is an equidigital number, since it uses as much as digits as its factorization.

51761162591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 44.

The spelling of 51761162591 in words is "fifty-one billion, seven hundred sixty-one million, one hundred sixty-two thousand, five hundred ninety-one".