16221216484 has 48 divisors (see below), whose sum is σ = 32678049600. Its totient is φ = 6967987200.

The previous prime is 16221216449. The next prime is 16221216491. The reversal of 16221216484 is 48461212261.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 318204 + ... + 365644.

It is an arithmetic number, because the mean of its divisors is an integer number (680792700).

Almost surely, 2^16221216484 is an apocalyptic number.

It is an amenable number.

16221216484 is an abundant number, since it is smaller than the sum of its proper divisors (16456833116).

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

16221216484 is a wasteful number, since it uses less digits than its factorization.

16221216484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47884 (or 47882 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The spelling of 16221216484 in words is "sixteen billion, two hundred twenty-one million, two hundred sixteen thousand, four hundred eighty-four".