216221996604 has 24 divisors (see below), whose sum is σ = 510186736080. Its totient is φ = 71264178304.

The previous prime is 216221996603. The next prime is 216221996647. The reversal of 216221996604 is 406699122612.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216221996603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101226459 + ... + 101228594.

It is an arithmetic number, because the mean of its divisors is an integer number (21257780670).

Almost surely, 2^216221996604 is an apocalyptic number.

It is an amenable number.

216221996604 is an abundant number, since it is smaller than the sum of its proper divisors (293964739476).

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

216221996604 is a wasteful number, since it uses less digits than its factorization.

216221996604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202455149 (or 202455147 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 216221996604 in words is "two hundred sixteen billion, two hundred twenty-one million, nine hundred ninety-six thousand, six hundred four".