16973602809 has 4 divisors (see below), whose sum is σ = 22631470416. Its totient is φ = 11315735204.

The previous prime is 16973602787. The next prime is 16973602829. The reversal of 16973602809 is 90820637961.

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.

It is a cyclic number.

It is not a de Polignac number, because 16973602809 - 2⁹ = 16973602297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16973602829) 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, 2828933799 + ... + 2828933804.

It is an arithmetic number, because the mean of its divisors is an integer number (5657867604).

Almost surely, 2^16973602809 is an apocalyptic number.

It is an amenable number.

16973602809 is a deficient number, since it is larger than the sum of its proper divisors (5657867607).

16973602809 is an equidigital number, since it uses as much as digits as its factorization.

16973602809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657867606.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 16973602809 in words is "sixteen billion, nine hundred seventy-three million, six hundred two thousand, eight hundred nine".