221116600640 has 112 divisors (see below), whose sum is σ = 567235482240. Its totient is φ = 81614407680.

The previous prime is 221116600633. The next prime is 221116600669. The reversal of 221116600640 is 46006611122.

It is a congruent number.

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, 14598191 + ... + 14613329.

It is an arithmetic number, because the mean of its divisors is an integer number (5064602520).

Almost surely, 2^221116600640 is an apocalyptic number.

221116600640 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 221116600640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283617741120).

221116600640 is an abundant number, since it is smaller than the sum of its proper divisors (346118881600).

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

221116600640 is a wasteful number, since it uses less digits than its factorization.

221116600640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18680 (or 18670 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 221116600640 in words is "two hundred twenty-one billion, one hundred sixteen million, six hundred thousand, six hundred forty".