77312789599 has 2 divisors, whose sum is σ = 77312789600. Its totient is φ = 77312789598.

The previous prime is 77312789597. The next prime is 77312789633. The reversal of 77312789599 is 99598721377.

It is a weak prime.

It is an emirp because it is prime and its reverse (99598721377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77312789599 - 2¹ = 77312789597 is a prime.

Together with 77312789597, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77312789597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38656394799 + 38656394800.

It is an arithmetic number, because the mean of its divisors is an integer number (38656394800).

Almost surely, 2^77312789599 is an apocalyptic number.

77312789599 is a deficient number, since it is larger than the sum of its proper divisors (1).

77312789599 is an equidigital number, since it uses as much as digits as its factorization.

77312789599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60011280, while the sum is 67.

The spelling of 77312789599 in words is "seventy-seven billion, three hundred twelve million, seven hundred eighty-nine thousand, five hundred ninety-nine".