6782181316 has 9 divisors (see below), whose sum is σ = 11869105549. Its totient is φ = 3391008304.

The previous prime is 6782181313. The next prime is 6782181317. The reversal of 6782181316 is 6131812876.

The square root of 6782181316 is 82354.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1726402500 + 5055778816 = 41550^2 + 71104^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6782181311) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 144120 + ... + 185296.

Almost surely, 2^6782181316 is an apocalyptic number.

6782181316 is the 82354-th square number.

It is an amenable number.

6782181316 is a deficient number, since it is larger than the sum of its proper divisors (5086924233).

6782181316 is an frugal number, since it uses more digits than its factorization.

6782181316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82358 (or 41179 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The cubic root of 6782181316 is about 1892.8802157287.

The spelling of 6782181316 in words is "six billion, seven hundred eighty-two million, one hundred eighty-one thousand, three hundred sixteen".