51255150775729 has 2 divisors, whose sum is σ = 51255150775730. Its totient is φ = 51255150775728.

The previous prime is 51255150775691. The next prime is 51255150775769. The reversal of 51255150775729 is 92757705155215.

51255150775729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48813907023025 + 2441243752704 = 6986695^2 + 1562448^2 .

It is a cyclic number.

It is not a de Polignac number, because 51255150775729 - 2¹³ = 51255150767537 is a prime.

It is a super-2 number, since 2×51255150775729² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51255150775769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25627575387864 + 25627575387865.

It is an arithmetic number, because the mean of its divisors is an integer number (25627575387865).

Almost surely, 2^{51255150775729} is an apocalyptic number.

It is an amenable number.

51255150775729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51255150775729 is an equidigital number, since it uses as much as digits as its factorization.

51255150775729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38587500, while the sum is 61.

The spelling of 51255150775729 in words is "fifty-one trillion, two hundred fifty-five billion, one hundred fifty million, seven hundred seventy-five thousand, seven hundred twenty-nine".