51847762805 has 18 divisors (see below), whose sum is σ = 63063769986. Its totient is φ = 40921398336.

The previous prime is 51847762801. The next prime is 51847762831. The reversal of 51847762805 is 50826774815.

It can be written as a sum of positive squares in 3 ways, for example, as 19376083204 + 32471679601 = 139198^2 + 180199^2 .

It is not a de Polignac number, because 51847762805 - 2² = 51847762801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51847762801) 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 in 17 ways as a sum of consecutive naturals, for example, 40222601 + ... + 40223889.

It is an arithmetic number, because the mean of its divisors is an integer number (3503542777).

Almost surely, 2^51847762805 is an apocalyptic number.

It is an amenable number.

51847762805 is a deficient number, since it is larger than the sum of its proper divisors (11216007181).

51847762805 is an frugal number, since it uses more digits than its factorization.

51847762805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 51847762805 in words is "fifty-one billion, eight hundred forty-seven million, seven hundred sixty-two thousand, eight hundred five".