16843321649 has 16 divisors (see below), whose sum is σ = 21014117376. Its totient is φ = 13115509200.

The previous prime is 16843321639. The next prime is 16843321669. The reversal of 16843321649 is 94612334861.

It is a cyclic number.

It is not a de Polignac number, because 16843321649 - 2⁸ = 16843321393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16843321639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35834 + ... + 187004.

It is an arithmetic number, because the mean of its divisors is an integer number (1313382336).

Almost surely, 2^16843321649 is an apocalyptic number.

It is an amenable number.

16843321649 is a deficient number, since it is larger than the sum of its proper divisors (4170795727).

16843321649 is a wasteful number, since it uses less digits than its factorization.

16843321649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152636.

The product of its digits is 746496, while the sum is 47.

The spelling of 16843321649 in words is "sixteen billion, eight hundred forty-three million, three hundred twenty-one thousand, six hundred forty-nine".