78829124999 has 2 divisors, whose sum is σ = 78829125000. Its totient is φ = 78829124998.

The previous prime is 78829124963. The next prime is 78829125007. The reversal of 78829124999 is 99942192887.

It is a strong prime.

It is an emirp because it is prime and its reverse (99942192887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78829124999 - 2²⁰ = 78828076423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78829124299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39414562499 + 39414562500.

It is an arithmetic number, because the mean of its divisors is an integer number (39414562500).

Almost surely, 2^78829124999 is an apocalyptic number.

78829124999 is a deficient number, since it is larger than the sum of its proper divisors (1).

78829124999 is an equidigital number, since it uses as much as digits as its factorization.

78829124999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 68.

The spelling of 78829124999 in words is "seventy-eight billion, eight hundred twenty-nine million, one hundred twenty-four thousand, nine hundred ninety-nine".