51827695891 has 2 divisors, whose sum is σ = 51827695892. Its totient is φ = 51827695890.

The previous prime is 51827695877. The next prime is 51827695921. The reversal of 51827695891 is 19859672815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51827695891 - 2⁵ = 51827695859 is a prime.

It is a super-2 number, since 2×51827695891² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51827695831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25913847945 + 25913847946.

It is an arithmetic number, because the mean of its divisors is an integer number (25913847946).

Almost surely, 2^51827695891 is an apocalyptic number.

51827695891 is a deficient number, since it is larger than the sum of its proper divisors (1).

51827695891 is an equidigital number, since it uses as much as digits as its factorization.

51827695891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 61.

The spelling of 51827695891 in words is "fifty-one billion, eight hundred twenty-seven million, six hundred ninety-five thousand, eight hundred ninety-one".