78849725839 has 8 divisors (see below), whose sum is σ = 83615809680. Its totient is φ = 74097849216.

The previous prime is 78849725809. The next prime is 78849725923. The reversal of 78849725839 is 93852794887.

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

It is a cyclic number.

It is not a de Polignac number, because 78849725839 - 2⁵ = 78849725807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78849725809) 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, 3540369 + ... + 3562570.

It is an arithmetic number, because the mean of its divisors is an integer number (10451976210).

Almost surely, 2^78849725839 is an apocalyptic number.

78849725839 is a deficient number, since it is larger than the sum of its proper divisors (4766083841).

78849725839 is a wasteful number, since it uses less digits than its factorization.

78849725839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103609.

The product of its digits is 243855360, while the sum is 70.

The spelling of 78849725839 in words is "seventy-eight billion, eight hundred forty-nine million, seven hundred twenty-five thousand, eight hundred thirty-nine".