6221655216 has 60 divisors (see below), whose sum is σ = 19899424272. Its totient is φ = 1777615488.

The previous prime is 6221655199. The next prime is 6221655217. The reversal of 6221655216 is 6125561226.

6221655216 is a `hidden beast` number, since 622 + 1 + 6 + 5 + 5 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6221655217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3085131 + ... + 3087146.

Almost surely, 2^6221655216 is an apocalyptic number.

It is an amenable number.

6221655216 is an abundant number, since it is smaller than the sum of its proper divisors (13677769056).

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

6221655216 is a wasteful number, since it uses less digits than its factorization.

6221655216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172298 (or 6172289 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 6221655216 is about 78877.4696348710. The cubic root of 6221655216 is about 1839.2269137293.

The spelling of 6221655216 in words is "six billion, two hundred twenty-one million, six hundred fifty-five thousand, two hundred sixteen".