16912321344 has 448 divisors, whose sum is σ = 56056377600. Its totient is φ = 4968677376.

The previous prime is 16912321331. The next prime is 16912321381. The reversal of 16912321344 is 44312321961.

It is a super-2 number, since 2×16912321344² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16912321299 and 16912321308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87628512 + ... + 87628704.

Almost surely, 2^16912321344 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 16912321344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28028188800).

16912321344 is an abundant number, since it is smaller than the sum of its proper divisors (39144056256).

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

16912321344 is a wasteful number, since it uses less digits than its factorization.

16912321344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 391 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The spelling of 16912321344 in words is "sixteen billion, nine hundred twelve million, three hundred twenty-one thousand, three hundred forty-four".