79747066459 has 2 divisors, whose sum is σ = 79747066460. Its totient is φ = 79747066458.

The previous prime is 79747066417. The next prime is 79747066481. The reversal of 79747066459 is 95466074797.

It is a strong prime.

It is an emirp because it is prime and its reverse (95466074797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79747066459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79747066459.

It is not a weakly prime, because it can be changed into another prime (79747066409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39873533229 + 39873533230.

It is an arithmetic number, because the mean of its divisors is an integer number (39873533230).

Almost surely, 2^79747066459 is an apocalyptic number.

79747066459 is a deficient number, since it is larger than the sum of its proper divisors (1).

79747066459 is an equidigital number, since it uses as much as digits as its factorization.

79747066459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80015040, while the sum is 64.

The spelling of 79747066459 in words is "seventy-nine billion, seven hundred forty-seven million, sixty-six thousand, four hundred fifty-nine".