78999199999 has 8 divisors (see below), whose sum is σ = 79440907392. Its totient is φ = 78558663840.

The previous prime is 78999199963. The next prime is 78999200011. The reversal of 78999199999 is 99999199987.

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 78999199999 - 2⁷ = 78999199871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78999199949) 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, 157359 + ... + 427504.

It is an arithmetic number, because the mean of its divisors is an integer number (9930113424).

Almost surely, 2^78999199999 is an apocalyptic number.

78999199999 is a deficient number, since it is larger than the sum of its proper divisors (441707393).

78999199999 is a wasteful number, since it uses less digits than its factorization.

78999199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585617.

The product of its digits is 2410616376, while the sum is 88.

The spelling of 78999199999 in words is "seventy-eight billion, nine hundred ninety-nine million, one hundred ninety-nine thousand, nine hundred ninety-nine".