51726806009 has 2 divisors, whose sum is σ = 51726806010. Its totient is φ = 51726806008.

The previous prime is 51726805919. The next prime is 51726806023. The reversal of 51726806009 is 90060862715.

51726806009 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 can be written as a sum of positive squares in only one way, i.e., 37392730384 + 14334075625 = 193372^2 + 119725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51726806009 is a prime.

It is not a weakly prime, because it can be changed into another prime (51726806029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25863403004 + 25863403005.

It is an arithmetic number, because the mean of its divisors is an integer number (25863403005).

Almost surely, 2^51726806009 is an apocalyptic number.

It is an amenable number.

51726806009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726806009 is an equidigital number, since it uses as much as digits as its factorization.

51726806009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 51726806009 in words is "fifty-one billion, seven hundred twenty-six million, eight hundred six thousand, nine".