6281999216 has 40 divisors (see below), whose sum is σ = 12583718400. Its totient is φ = 3034906560.

The previous prime is 6281999197. The next prime is 6281999291. The reversal of 6281999216 is 6129991826.

It is a super-2 number, since 2×6281999216² = 78927028299649229312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317255 + ... + 336473.

It is an arithmetic number, because the mean of its divisors is an integer number (314592960).

Almost surely, 2^6281999216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6281999216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6291859200).

6281999216 is an abundant number, since it is smaller than the sum of its proper divisors (6301719184).

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

6281999216 is a wasteful number, since it uses less digits than its factorization.

6281999216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19917 (or 19911 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 6281999216 is about 79259.0639359310. The cubic root of 6281999216 is about 1845.1540293895.

The spelling of 6281999216 in words is "six billion, two hundred eighty-one million, nine hundred ninety-nine thousand, two hundred sixteen".