4221384561668 has 12 divisors (see below), whose sum is σ = 7387588780572. Its totient is φ = 2110644910080.

The previous prime is 4221384561631. The next prime is 4221384561671. The reversal of 4221384561668 is 8661654831224.

It can be written as a sum of positive squares in 2 ways, for example, as 2184005154244 + 2037379407424 = 1477838^2 + 1427368^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11641805 + ... + 11998932.

It is an arithmetic number, because the mean of its divisors is an integer number (615632398381).

Almost surely, 2^{4221384561668} is an apocalyptic number.

It is an amenable number.

4221384561668 is a deficient number, since it is larger than the sum of its proper divisors (3166204218904).

4221384561668 is a wasteful number, since it uses less digits than its factorization.

4221384561668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23685382 (or 23685380 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 56.

The spelling of 4221384561668 in words is "four trillion, two hundred twenty-one billion, three hundred eighty-four million, five hundred sixty-one thousand, six hundred sixty-eight".