78600000005 has 4 divisors (see below), whose sum is σ = 94320000012. Its totient is φ = 62880000000.

The previous prime is 78599999977. The next prime is 78600000019. The reversal of 78600000005 is 50000000687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33274867396 + 45325132609 = 182414^2 + 212897^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78600000005 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78600000005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7859999996 + ... + 7860000005.

It is an arithmetic number, because the mean of its divisors is an integer number (23580000003).

Almost surely, 2^78600000005 is an apocalyptic number.

It is an amenable number.

78600000005 is a deficient number, since it is larger than the sum of its proper divisors (15720000007).

78600000005 is a wasteful number, since it uses less digits than its factorization.

78600000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15720000006.

The product of its (nonzero) digits is 1680, while the sum is 26.

The spelling of 78600000005 in words is "seventy-eight billion, six hundred million, five", and thus it is an aban number.