16224644321320 has 16 divisors (see below), whose sum is σ = 36505449723060. Its totient is φ = 6489857728512.

The previous prime is 16224644321297. The next prime is 16224644321323. The reversal of 16224644321320 is 2312344642261.

It can be written as a sum of positive squares in 2 ways, for example, as 15134169550756 + 1090474770564 = 3890266^2 + 1044258^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 405616108033 = 16224644321320 / (1 + 6 + 2 + 2 + 4 + 6 + 4 + 4 + 3 + 2 + 1 + 3 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (16224644321323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202808053977 + ... + 202808054056.

Almost surely, 2^{16224644321320} is an apocalyptic number.

16224644321320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16224644321320 is an abundant number, since it is smaller than the sum of its proper divisors (20280805401740).

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

16224644321320 is a wasteful number, since it uses less digits than its factorization.

16224644321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405616108044 (or 405616108040 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

Adding to 16224644321320 its reverse (2312344642261), we get a palindrome (18536988963581).

The spelling of 16224644321320 in words is "sixteen trillion, two hundred twenty-four billion, six hundred forty-four million, three hundred twenty-one thousand, three hundred twenty".