4221688979618 has 128 divisors (see below), whose sum is σ = 7809642086400. Its totient is φ = 1688823259200.

The previous prime is 4221688979617. The next prime is 4221688979621. The reversal of 4221688979618 is 8169798861224.

It is not an unprimeable number, because it can be changed into a prime (4221688979617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47034923 + ... + 47124593.

It is an arithmetic number, because the mean of its divisors is an integer number (61012828800).

Almost surely, 2^{4221688979618} is an apocalyptic number.

4221688979618 is a deficient number, since it is larger than the sum of its proper divisors (3587953106782).

4221688979618 is a wasteful number, since it uses less digits than its factorization.

4221688979618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89868.

The product of its digits is 167215104, while the sum is 71.

The spelling of 4221688979618 in words is "four trillion, two hundred twenty-one billion, six hundred eighty-eight million, nine hundred seventy-nine thousand, six hundred eighteen".