16632221521320 has 96 divisors (see below), whose sum is σ = 54074691609120. Its totient is φ = 4433620371840.

The previous prime is 16632221521301. The next prime is 16632221521327. The reversal of 16632221521320 is 2312512223661.

16632221521320 is a `hidden beast` number, since 1 + 6 + 6 + 322 + 2 + 1 + 5 + 2 + 1 + 320 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (16632221521327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7559026 + ... + 9508065.

It is an arithmetic number, because the mean of its divisors is an integer number (563278037595).

Almost surely, 2^{16632221521320} is an apocalyptic number.

16632221521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16632221521320 is an abundant number, since it is smaller than the sum of its proper divisors (37442470087800).

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

16632221521320 is a wasteful number, since it uses less digits than its factorization.

16632221521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17069815 (or 17069808 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 16632221521320 its reverse (2312512223661), we get a palindrome (18944733744981).

The spelling of 16632221521320 in words is "sixteen trillion, six hundred thirty-two billion, two hundred twenty-one million, five hundred twenty-one thousand, three hundred twenty".