78848639999 has 16 divisors (see below), whose sum is σ = 83437238400. Its totient is φ = 74304493344.

The previous prime is 78848639959. The next prime is 78848640011. The reversal of 78848639999 is 99993684887.

It is a Cunningham number, because it is equal to 280800²-1.

It is a cyclic number.

It is not a de Polignac number, because 78848639999 - 2²⁸ = 78580204543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78848639959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5327792 + ... + 5342570.

It is an arithmetic number, because the mean of its divisors is an integer number (5214827400).

Almost surely, 2^78848639999 is an apocalyptic number.

78848639999 is a deficient number, since it is larger than the sum of its proper divisors (4588598401).

78848639999 is a wasteful number, since it uses less digits than its factorization.

78848639999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262.

The product of its digits is 1693052928, while the sum is 80.

The spelling of 78848639999 in words is "seventy-eight billion, eight hundred forty-eight million, six hundred thirty-nine thousand, nine hundred ninety-nine".