6218755812 has 72 divisors (see below), whose sum is σ = 15942326400. Its totient is φ = 2043632448.

The previous prime is 6218755799. The next prime is 6218755813. The reversal of 6218755812 is 2185578126.

6218755812 is a `hidden beast` number, since 6 + 2 + 1 + 87 + 558 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (6218755813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2692114 + ... + 2694422.

It is an arithmetic number, because the mean of its divisors is an integer number (221421200).

Almost surely, 2^6218755812 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 6218755812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7971163200).

6218755812 is an abundant number, since it is smaller than the sum of its proper divisors (9723570588).

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

6218755812 is a wasteful number, since it uses less digits than its factorization.

6218755812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345 (or 3340 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 6218755812 is about 78859.0883284863. The cubic root of 6218755812 is about 1838.9411649871.

The spelling of 6218755812 in words is "six billion, two hundred eighteen million, seven hundred fifty-five thousand, eight hundred twelve".