78215819996179 has 2 divisors, whose sum is σ = 78215819996180. Its totient is φ = 78215819996178.

The previous prime is 78215819996147. The next prime is 78215819996203. The reversal of 78215819996179 is 97169991851287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78215819996179 - 2⁵ = 78215819996147 is a prime.

It is a super-2 number, since 2×78215819996179² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78215819996129) 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, 39107909998089 + 39107909998090.

It is an arithmetic number, because the mean of its divisors is an integer number (39107909998090).

Almost surely, 2^{78215819996179} is an apocalyptic number.

78215819996179 is a deficient number, since it is larger than the sum of its proper divisors (1).

78215819996179 is an equidigital number, since it uses as much as digits as its factorization.

78215819996179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1234517760, while the sum is 82.

The spelling of 78215819996179 in words is "seventy-eight trillion, two hundred fifteen billion, eight hundred nineteen million, nine hundred ninety-six thousand, one hundred seventy-nine".