16391638896 has 80 divisors (see below), whose sum is σ = 44641976064. Its totient is φ = 5172406272.

The previous prime is 16391638877. The next prime is 16391638931. The reversal of 16391638896 is 69883619361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30555 + ... + 183621.

Almost surely, 2^16391638896 is an apocalyptic number.

16391638896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16391638896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22320988032).

16391638896 is an abundant number, since it is smaller than the sum of its proper divisors (28250337168).

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

16391638896 is a wasteful number, since it uses less digits than its factorization.

16391638896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153198 (or 153192 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The spelling of 16391638896 in words is "sixteen billion, three hundred ninety-one million, six hundred thirty-eight thousand, eight hundred ninety-six".