51306652729 has 2 divisors, whose sum is σ = 51306652730. Its totient is φ = 51306652728.

The previous prime is 51306652643. The next prime is 51306652741. The reversal of 51306652729 is 92725660315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51144727104 + 161925625 = 226152^2 + 12725^2 .

It is a cyclic number.

It is not a de Polignac number, because 51306652729 - 2⁹ = 51306652217 is a prime.

It is a super-2 number, since 2×51306652729² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51306652429) 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, 25653326364 + 25653326365.

It is an arithmetic number, because the mean of its divisors is an integer number (25653326365).

Almost surely, 2^51306652729 is an apocalyptic number.

It is an amenable number.

51306652729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51306652729 is an equidigital number, since it uses as much as digits as its factorization.

51306652729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 51306652729 in words is "fifty-one billion, three hundred six million, six hundred fifty-two thousand, seven hundred twenty-nine".