51736585729 has 2 divisors, whose sum is σ = 51736585730. Its totient is φ = 51736585728.

The previous prime is 51736585727. The next prime is 51736585913. The reversal of 51736585729 is 92758563715.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44211370225 + 7525215504 = 210265^2 + 86748^2 .

It is a cyclic number.

It is not a de Polignac number, because 51736585729 - 2¹ = 51736585727 is a prime.

It is a super-2 number, since 2×51736585729² (a number of 22 digits) contains 22 as substring.

Together with 51736585727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51736585727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25868292864 + 25868292865.

It is an arithmetic number, because the mean of its divisors is an integer number (25868292865).

Almost surely, 2^51736585729 is an apocalyptic number.

It is an amenable number.

51736585729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51736585729 is an equidigital number, since it uses as much as digits as its factorization.

51736585729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 58.

The spelling of 51736585729 in words is "fifty-one billion, seven hundred thirty-six million, five hundred eighty-five thousand, seven hundred twenty-nine".