78094817838 has 24 divisors (see below), whose sum is σ = 179158700448. Its totient is φ = 24500334912.

The previous prime is 78094817833. The next prime is 78094817881. The reversal of 78094817838 is 83871849087.

78094817838 is a `hidden beast` number, since 7 + 80 + 9 + 481 + 78 + 3 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78094817831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127605606 + ... + 127606217.

It is an arithmetic number, because the mean of its divisors is an integer number (7464945852).

Almost surely, 2^78094817838 is an apocalyptic number.

78094817838 is an abundant number, since it is smaller than the sum of its proper divisors (101063882610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78094817838 is a wasteful number, since it uses less digits than its factorization.

78094817838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255211848 (or 255211845 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 78094817838 in words is "seventy-eight billion, ninety-four million, eight hundred seventeen thousand, eight hundred thirty-eight".