6731771328 has 140 divisors (see below), whose sum is σ = 20007834000. Its totient is φ = 2237995008.

The previous prime is 6731771323. The next prime is 6731771339. The reversal of 6731771328 is 8231771376.

6731771328 is a `hidden beast` number, since 6 + 7 + 317 + 7 + 1 + 328 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731771323) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2243173 + ... + 2246171.

It is an arithmetic number, because the mean of its divisors is an integer number (142913100).

Almost surely, 2^6731771328 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 6731771328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10003917000).

6731771328 is an abundant number, since it is smaller than the sum of its proper divisors (13276062672).

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

6731771328 is a wasteful number, since it uses less digits than its factorization.

6731771328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456 (or 3437 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 6731771328 is about 82047.3724624988. The cubic root of 6731771328 is about 1888.1788050037.

The spelling of 6731771328 in words is "six billion, seven hundred thirty-one million, seven hundred seventy-one thousand, three hundred twenty-eight".