6469947216 has 30 divisors (see below), whose sum is σ = 18106866570. Its totient is φ = 2156649024.

The previous prime is 6469947191. The next prime is 6469947229. The reversal of 6469947216 is 6127499646.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6282147600 + 187799616 = 79260^2 + 13704^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22464951 + ... + 22465238.

It is an arithmetic number, because the mean of its divisors is an integer number (603562219).

Almost surely, 2^6469947216 is an apocalyptic number.

It is an amenable number.

6469947216 is an abundant number, since it is smaller than the sum of its proper divisors (11636919354).

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

6469947216 is a wasteful number, since it uses less digits than its factorization.

6469947216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44930203 (or 44930194 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 6469947216 is about 80435.9820975663. The cubic root of 6469947216 is about 1863.3749201141.

The spelling of 6469947216 in words is "six billion, four hundred sixty-nine million, nine hundred forty-seven thousand, two hundred sixteen".