16221859860 has 96 divisors (see below), whose sum is σ = 45852291072. Its totient is φ = 4284887040.

The previous prime is 16221859859. The next prime is 16221859861. The reversal of 16221859860 is 6895812261.

16221859860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16221859859) and next prime (16221859861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221859861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6254724 + ... + 6257316.

It is an arithmetic number, because the mean of its divisors is an integer number (477628032).

Almost surely, 2^16221859860 is an apocalyptic number.

16221859860 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 16221859860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22926145536).

16221859860 is an abundant number, since it is smaller than the sum of its proper divisors (29630431212).

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

16221859860 is a wasteful number, since it uses less digits than its factorization.

16221859860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553 (or 3551 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 16221859860 in words is "sixteen billion, two hundred twenty-one million, eight hundred fifty-nine thousand, eight hundred sixty".