799999999999 has 8 divisors (see below), whose sum is σ = 808542282240. Its totient is φ = 791494618200.

The previous prime is 799999999991. The next prime is 800000000047. The reversal of 799999999999 is 999999999997.

It is a happy number.

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 799999999999 - 2³ = 799999999991 is a prime.

It is a super-9 number, since 9×799999999999⁹ (a number of 109 digits) contains 999999999 as substring.

It is a Duffinian number.

799999999999 is a modest number, since divided by 999999 gives 799999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799999999991) 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, 9181519 + ... + 9268240.

It is an arithmetic number, because the mean of its divisors is an integer number (101067785280).

Almost surely, 2^799999999999 is an apocalyptic number.

799999999999 is a deficient number, since it is larger than the sum of its proper divisors (8542282241).

799999999999 is a wasteful number, since it uses less digits than its factorization.

799999999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450221.

The product of its digits is 219667417263, while the sum is 106.

It can be divided in two parts, 79999999999 and 9, that added together give a palindrome (80000000008).

The spelling of 799999999999 in words is "seven hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".