16867016849 has 4 divisors (see below), whose sum is σ = 16870199220. Its totient is φ = 16863834480.

The previous prime is 16867016843. The next prime is 16867016869. The reversal of 16867016849 is 94861076861.

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 1299963025 + 15567053824 = 36055^2 + 124768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16867016849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16867016794 and 16867016803.

It is not an unprimeable number, because it can be changed into a prime (16867016843) 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, 1583222 + ... + 1593839.

It is an arithmetic number, because the mean of its divisors is an integer number (4217549805).

Almost surely, 2^16867016849 is an apocalyptic number.

It is an amenable number.

16867016849 is a deficient number, since it is larger than the sum of its proper divisors (3182371).

16867016849 is an equidigital number, since it uses as much as digits as its factorization.

16867016849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182370.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 16867016849 in words is "sixteen billion, eight hundred sixty-seven million, sixteen thousand, eight hundred forty-nine".