77129972735239 has 2 divisors, whose sum is σ = 77129972735240. Its totient is φ = 77129972735238.

The previous prime is 77129972735191. The next prime is 77129972735293. The reversal of 77129972735239 is 93253727992177.

Together with next prime (77129972735293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (93253727992177) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77129972735239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77129972715239) 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, 38564986367619 + 38564986367620.

It is an arithmetic number, because the mean of its divisors is an integer number (38564986367620).

Almost surely, 2^{77129972735239} is an apocalyptic number.

77129972735239 is a deficient number, since it is larger than the sum of its proper divisors (1).

77129972735239 is an equidigital number, since it uses as much as digits as its factorization.

77129972735239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630118440, while the sum is 73.

The spelling of 77129972735239 in words is "seventy-seven trillion, one hundred twenty-nine billion, nine hundred seventy-two million, seven hundred thirty-five thousand, two hundred thirty-nine".