16851938448 has 80 divisors (see below), whose sum is σ = 45460840320. Its totient is φ = 5369075712.

The previous prime is 16851938429. The next prime is 16851938473. The reversal of 16851938448 is 84483915861.

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, 1709598 + ... + 1719426.

It is an arithmetic number, because the mean of its divisors is an integer number (568260504).

Almost surely, 2^16851938448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16851938448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22730420160).

16851938448 is an abundant number, since it is smaller than the sum of its proper divisors (28608901872).

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

16851938448 is a wasteful number, since it uses less digits than its factorization.

16851938448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416 (or 11410 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 57.

The spelling of 16851938448 in words is "sixteen billion, eight hundred fifty-one million, nine hundred thirty-eight thousand, four hundred forty-eight".