78039654889 has 8 divisors (see below), whose sum is σ = 89207949440. Its totient is φ = 66876303456.

The previous prime is 78039654887. The next prime is 78039654943. The reversal of 78039654889 is 98845693087.

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 78039654889 - 2¹ = 78039654887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78039654881) 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 7 ways as a sum of consecutive naturals, for example, 1201884 + ... + 1265149.

It is an arithmetic number, because the mean of its divisors is an integer number (11150993680).

Almost surely, 2^78039654889 is an apocalyptic number.

It is an amenable number.

78039654889 is a deficient number, since it is larger than the sum of its proper divisors (11168294551).

78039654889 is a wasteful number, since it uses less digits than its factorization.

78039654889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471559.

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 78039654889 in words is "seventy-eight billion, thirty-nine million, six hundred fifty-four thousand, eight hundred eighty-nine".