16639393368 has 32 divisors (see below), whose sum is σ = 44798367600. Its totient is φ = 5119813248.

The previous prime is 16639393361. The next prime is 16639393417. The reversal of 16639393368 is 86339393661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639393361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26665383 + ... + 26666006.

Almost surely, 2^16639393368 is an apocalyptic number.

It is an amenable number.

16639393368 is an abundant number, since it is smaller than the sum of its proper divisors (28158974232).

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

16639393368 is a wasteful number, since it uses less digits than its factorization.

16639393368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53331411 (or 53331407 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 57.

The spelling of 16639393368 in words is "sixteen billion, six hundred thirty-nine million, three hundred ninety-three thousand, three hundred sixty-eight".