16326450720 has 672 divisors, whose sum is σ = 62468884800. Its totient is φ = 4017641472.

The previous prime is 16326450719. The next prime is 16326450761. The reversal of 16326450720 is 2705462361.

16326450720 is a `hidden beast` number, since 1 + 6 + 3 + 2 + 645 + 0 + 7 + 2 + 0 = 666.

It is a super-2 number, since 2×16326450720² (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 an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 117456411 + ... + 117456549.

It is an arithmetic number, because the mean of its divisors is an integer number (92959650).

Almost surely, 2^16326450720 is an apocalyptic number.

16326450720 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 16326450720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31234442400).

16326450720 is an abundant number, since it is smaller than the sum of its proper divisors (46142434080).

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

16326450720 is a wasteful number, since it uses less digits than its factorization.

16326450720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 16326450720 in words is "sixteen billion, three hundred twenty-six million, four hundred fifty thousand, seven hundred twenty".