78847826869 has 8 divisors (see below), whose sum is σ = 90290954880. Its totient is φ = 67449487056.

The previous prime is 78847826857. The next prime is 78847826873. The reversal of 78847826869 is 96862874887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-78847826869 is a prime.

It is a super-2 number, since 2×78847826869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78847826569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11193274 + ... + 11200315.

It is an arithmetic number, because the mean of its divisors is an integer number (11286369360).

Almost surely, 2^78847826869 is an apocalyptic number.

It is an amenable number.

78847826869 is a deficient number, since it is larger than the sum of its proper divisors (11443128011).

78847826869 is a wasteful number, since it uses less digits than its factorization.

78847826869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22394099.

The product of its digits is 520224768, while the sum is 73.

The spelling of 78847826869 in words is "seventy-eight billion, eight hundred forty-seven million, eight hundred twenty-six thousand, eight hundred sixty-nine".