78663860179 has 2 divisors, whose sum is σ = 78663860180. Its totient is φ = 78663860178.

The previous prime is 78663860153. The next prime is 78663860189. The reversal of 78663860179 is 97106836687.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78663860179 is a prime.

It is a super-2 number, since 2×78663860179² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78663860189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39331930089 + 39331930090.

It is an arithmetic number, because the mean of its divisors is an integer number (39331930090).

Almost surely, 2^78663860179 is an apocalyptic number.

78663860179 is a deficient number, since it is larger than the sum of its proper divisors (1).

78663860179 is an equidigital number, since it uses as much as digits as its factorization.

78663860179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 78663860179 in words is "seventy-eight billion, six hundred sixty-three million, eight hundred sixty thousand, one hundred seventy-nine".