16826793985 has 4 divisors (see below), whose sum is σ = 20192152788. Its totient is φ = 13461435184.

The previous prime is 16826793937. The next prime is 16826794009. The reversal of 16826793985 is 58939762861.

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 10722809601 + 6103984384 = 103551^2 + 78128^2 .

It is a cyclic number.

It is not a de Polignac number, because 16826793985 - 2⁷ = 16826793857 is a prime.

It is a Duffinian 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, 1682679394 + ... + 1682679403.

It is an arithmetic number, because the mean of its divisors is an integer number (5048038197).

Almost surely, 2^16826793985 is an apocalyptic number.

It is an amenable number.

16826793985 is a deficient number, since it is larger than the sum of its proper divisors (3365358803).

16826793985 is an equidigital number, since it uses as much as digits as its factorization.

16826793985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365358802.

The product of its digits is 39191040, while the sum is 64.

The spelling of 16826793985 in words is "sixteen billion, eight hundred twenty-six million, seven hundred ninety-three thousand, nine hundred eighty-five".