78836428859 has 2 divisors, whose sum is σ = 78836428860. Its totient is φ = 78836428858.

The previous prime is 78836428849. The next prime is 78836428877. The reversal of 78836428859 is 95882463887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78836428859 - 2²⁴ = 78819651643 is a prime.

It is not a weakly prime, because it can be changed into another prime (78836428849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418214429 + 39418214430.

It is an arithmetic number, because the mean of its divisors is an integer number (39418214430).

Almost surely, 2^78836428859 is an apocalyptic number.

78836428859 is a deficient number, since it is larger than the sum of its proper divisors (1).

78836428859 is an equidigital number, since it uses as much as digits as its factorization.

78836428859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185794560, while the sum is 68.

The spelling of 78836428859 in words is "seventy-eight billion, eight hundred thirty-six million, four hundred twenty-eight thousand, eight hundred fifty-nine".