51841477817 has 2 divisors, whose sum is σ = 51841477818. Its totient is φ = 51841477816.

The previous prime is 51841477801. The next prime is 51841477841. The reversal of 51841477817 is 71877414815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30307676281 + 21533801536 = 174091^2 + 146744^2 .

It is a cyclic number.

It is not a de Polignac number, because 51841477817 - 2⁴ = 51841477801 is a prime.

It is not a weakly prime, because it can be changed into another prime (51841477517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25920738908 + 25920738909.

It is an arithmetic number, because the mean of its divisors is an integer number (25920738909).

Almost surely, 2^51841477817 is an apocalyptic number.

It is an amenable number.

51841477817 is a deficient number, since it is larger than the sum of its proper divisors (1).

51841477817 is an equidigital number, since it uses as much as digits as its factorization.

51841477817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1756160, while the sum is 53.

The spelling of 51841477817 in words is "fifty-one billion, eight hundred forty-one million, four hundred seventy-seven thousand, eight hundred seventeen".