221559441768 has 48 divisors (see below), whose sum is σ = 685779226080. Its totient is φ = 63302697504.

The previous prime is 221559441757. The next prime is 221559441787. The reversal of 221559441768 is 867144955122.

221559441768 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 594 + 41 + 7 + 6 + 8 = 666.

221559441768 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219800530 + ... + 219801537.

It is an arithmetic number, because the mean of its divisors is an integer number (14287067210).

Almost surely, 2^221559441768 is an apocalyptic number.

221559441768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221559441768 is an abundant number, since it is smaller than the sum of its proper divisors (464219784312).

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

221559441768 is a wasteful number, since it uses less digits than its factorization.

221559441768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439602086 (or 439602079 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 221559441768 in words is "two hundred twenty-one billion, five hundred fifty-nine million, four hundred forty-one thousand, seven hundred sixty-eight".