77818884068459 has 2 divisors, whose sum is σ = 77818884068460. Its totient is φ = 77818884068458.

The previous prime is 77818884068389. The next prime is 77818884068479. The reversal of 77818884068459 is 95486048881877.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77818884068459 is a prime.

It is not a weakly prime, because it can be changed into another prime (77818884068479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38909442034229 + 38909442034230.

It is an arithmetic number, because the mean of its divisors is an integer number (38909442034230).

Almost surely, 2^{77818884068459} is an apocalyptic number.

77818884068459 is a deficient number, since it is larger than the sum of its proper divisors (1).

77818884068459 is an equidigital number, since it uses as much as digits as its factorization.

77818884068459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6936330240, while the sum is 83.

The spelling of 77818884068459 in words is "seventy-seven trillion, eight hundred eighteen billion, eight hundred eighty-four million, sixty-eight thousand, four hundred fifty-nine".