16394781568 has 32 divisors (see below), whose sum is σ = 35630707320. Its totient is φ = 7452172800.

The previous prime is 16394781517. The next prime is 16394781629. The reversal of 16394781568 is 86518749361.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5820603 + ... + 5823418.

Almost surely, 2^16394781568 is an apocalyptic number.

It is an amenable number.

16394781568 is an abundant number, since it is smaller than the sum of its proper divisors (19235925752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16394781568 is a wasteful number, since it uses less digits than its factorization.

16394781568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11644046 (or 11644034 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The spelling of 16394781568 in words is "sixteen billion, three hundred ninety-four million, seven hundred eighty-one thousand, five hundred sixty-eight".