16221677652480 has 160 divisors (see below), whose sum is σ = 51872748681600. Its totient is φ = 4324606820352.

The previous prime is 16221677652473. The next prime is 16221677652493. The reversal of 16221677652480 is 8425677612261.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 16221677652480.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28200381 + ... + 28769859.

It is an arithmetic number, because the mean of its divisors is an integer number (324204679260).

Almost surely, 2^{16221677652480} is an apocalyptic number.

16221677652480 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 16221677652480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25936374340800).

16221677652480 is an abundant number, since it is smaller than the sum of its proper divisors (35651071029120).

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

16221677652480 is an equidigital number, since it uses as much as digits as its factorization.

16221677652480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573214 (or 573198 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 16221677652480 in words is "sixteen trillion, two hundred twenty-one billion, six hundred seventy-seven million, six hundred fifty-two thousand, four hundred eighty".