221448718680 has 512 divisors, whose sum is σ = 842202316800. Its totient is φ = 45414825984.

The previous prime is 221448718669. The next prime is 221448718697. The reversal of 221448718680 is 86817844122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37806312 + ... + 37812168.

It is an arithmetic number, because the mean of its divisors is an integer number (1644926400).

Almost surely, 2^221448718680 is an apocalyptic number.

221448718680 is a gapful number since it is divisible by the number (20) 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 221448718680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421101158400).

221448718680 is an abundant number, since it is smaller than the sum of its proper divisors (620753598120).

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

221448718680 is a wasteful number, since it uses less digits than its factorization.

221448718680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6023 (or 6019 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 221448718680 in words is "two hundred twenty-one billion, four hundred forty-eight million, seven hundred eighteen thousand, six hundred eighty".