79889416999 has 8 divisors (see below), whose sum is σ = 95271851520. Its totient is φ = 65499397656.

The previous prime is 79889416991. The next prime is 79889417033. The reversal of 79889416999 is 99961498897.

It is a happy number.

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

It is not a de Polignac number, because 79889416999 - 2³ = 79889416991 is a prime.

It is a super-2 number, since 2×79889416999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79889416991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248103619 + ... + 248103940.

It is an arithmetic number, because the mean of its divisors is an integer number (11908981440).

Almost surely, 2^79889416999 is an apocalyptic number.

79889416999 is a deficient number, since it is larger than the sum of its proper divisors (15382434521).

79889416999 is a wasteful number, since it uses less digits than its factorization.

79889416999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496207589.

The product of its digits is 634894848, while the sum is 79.

The spelling of 79889416999 in words is "seventy-nine billion, eight hundred eighty-nine million, four hundred sixteen thousand, nine hundred ninety-nine".