6781899312 has 200 divisors, whose sum is σ = 20279166336. Its totient is φ = 2186486784.

The previous prime is 6781899287. The next prime is 6781899323. The reversal of 6781899312 is 2139981876.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11172513 + ... + 11173119.

Almost surely, 2^6781899312 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 6781899312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10139583168).

6781899312 is an abundant number, since it is smaller than the sum of its proper divisors (13497267024).

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

6781899312 is a wasteful number, since it uses less digits than its factorization.

6781899312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 882 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 6781899312 is about 82352.2878370723. The cubic root of 6781899312 is about 1892.8539799614.

The spelling of 6781899312 in words is "six billion, seven hundred eighty-one million, eight hundred ninety-nine thousand, three hundred twelve".