16796579809 has 4 divisors (see below), whose sum is σ = 16815018240. Its totient is φ = 16778141380.

The previous prime is 16796579801. The next prime is 16796579827. The reversal of 16796579809 is 90897569761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90897569761 = 19 ⋅4784082619.

It is a cyclic number.

It is not a de Polignac number, because 16796579809 - 2³ = 16796579801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16796579801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9217849 + ... + 9219670.

It is an arithmetic number, because the mean of its divisors is an integer number (4203754560).

Almost surely, 2^16796579809 is an apocalyptic number.

It is an amenable number.

16796579809 is a deficient number, since it is larger than the sum of its proper divisors (18438431).

16796579809 is an equidigital number, since it uses as much as digits as its factorization.

16796579809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18438430.

The product of its (nonzero) digits is 51438240, while the sum is 67.

The spelling of 16796579809 in words is "sixteen billion, seven hundred ninety-six million, five hundred seventy-nine thousand, eight hundred nine".