78838327839 has 16 divisors (see below), whose sum is σ = 105958828800. Its totient is φ = 52138891200.

The previous prime is 78838327823. The next prime is 78838327853. The reversal of 78838327839 is 93872383887.

It is not a de Polignac number, because 78838327839 - 2⁴ = 78838327823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78838327839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78838327819) 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, 530262 + ... + 662460.

It is an arithmetic number, because the mean of its divisors is an integer number (6622426800).

Almost surely, 2^78838327839 is an apocalyptic number.

78838327839 is a deficient number, since it is larger than the sum of its proper divisors (27120500961).

78838327839 is a wasteful number, since it uses less digits than its factorization.

78838327839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133790.

The product of its digits is 97542144, while the sum is 66.

The spelling of 78838327839 in words is "seventy-eight billion, eight hundred thirty-eight million, three hundred twenty-seven thousand, eight hundred thirty-nine".