221664116004430 has 16 divisors (see below), whose sum is σ = 435267718699824. Its totient is φ = 80605133092480.

The previous prime is 221664116004337. The next prime is 221664116004469. The reversal of 221664116004430 is 34400611466122.

It is a happy number.

221664116004430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007564163547 + ... + 1007564163766.

It is an arithmetic number, because the mean of its divisors is an integer number (27204232418739).

Almost surely, 2^{221664116004430} is an apocalyptic number.

221664116004430 is a deficient number, since it is larger than the sum of its proper divisors (213603602695394).

221664116004430 is a wasteful number, since it uses less digits than its factorization.

221664116004430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015128327331.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 221664116004430 in words is "two hundred twenty-one trillion, six hundred sixty-four billion, one hundred sixteen million, four thousand, four hundred thirty".