16481344320 has 448 divisors, whose sum is σ = 67376893440. Its totient is φ = 3714564096.

The previous prime is 16481344309. The next prime is 16481344337. The reversal of 16481344320 is 2344318461.

16481344320 is a `hidden beast` number, since 1 + 648 + 1 + 3 + 4 + 4 + 3 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

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

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, 4413174 + ... + 4416906.

Almost surely, 2^16481344320 is an apocalyptic number.

16481344320 is a gapful number since it is divisible by the number (10) 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 16481344320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33688446720).

16481344320 is an abundant number, since it is smaller than the sum of its proper divisors (50895549120).

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

16481344320 is a wasteful number, since it uses less digits than its factorization.

16481344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 16481344320 in words is "sixteen billion, four hundred eighty-one million, three hundred forty-four thousand, three hundred twenty".