16324644864 has 416 divisors, whose sum is σ = 50954572800. Its totient is φ = 4599316480.

The previous prime is 16324644863. The next prime is 16324644901. The reversal of 16324644864 is 46844642361.

It is a Harshad number since it is a multiple of its sum of digits (48).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16324644863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183422932 + ... + 183423020.

Almost surely, 2^16324644864 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 16324644864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25477286400).

16324644864 is an abundant number, since it is smaller than the sum of its proper divisors (34629927936).

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

16324644864 is a wasteful number, since it uses less digits than its factorization.

16324644864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 187 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 48.

The spelling of 16324644864 in words is "sixteen billion, three hundred twenty-four million, six hundred forty-four thousand, eight hundred sixty-four".