4661221216 has 24 divisors (see below), whose sum is σ = 9575771184. Its totient is φ = 2229279360.

The previous prime is 4661221207. The next prime is 4661221223. The reversal of 4661221216 is 6121221664.

It is a happy number.

It is a congruent number.

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, 3165855 + ... + 3167326.

It is an arithmetic number, because the mean of its divisors is an integer number (398990466).

Almost surely, 2^4661221216 is an apocalyptic number.

4661221216 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

4661221216 is an abundant number, since it is smaller than the sum of its proper divisors (4914549968).

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

4661221216 is a wasteful number, since it uses less digits than its factorization.

4661221216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333214 (or 6333206 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 4661221216 is about 68273.1368548421. The cubic root of 4661221216 is about 1670.4490666080.

The spelling of 4661221216 in words is "four billion, six hundred sixty-one million, two hundred twenty-one thousand, two hundred sixteen".