6841109521 has 9 divisors (see below), whose sum is σ = 6914587771. Its totient is φ = 6768406552.

The previous prime is 6841109491. The next prime is 6841109549. The reversal of 6841109521 is 1259011486.

The square root of 6841109521 is 82711.

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., 435348225 + 6405761296 = 20865^2 + 80036^2 .

It is not a de Polignac number, because 6841109521 - 2¹³ = 6841101329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6841109551) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8849691 + ... + 8850463.

Almost surely, 2^6841109521 is an apocalyptic number.

6841109521 is the 82711-st square number.

6841109521 is the 41356-th centered octagonal number.

It is an amenable number.

6841109521 is a deficient number, since it is larger than the sum of its proper divisors (73478250).

6841109521 is an frugal number, since it uses more digits than its factorization.

6841109521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The cubic root of 6841109521 is about 1898.3466245348.

The spelling of 6841109521 in words is "six billion, eight hundred forty-one million, one hundred nine thousand, five hundred twenty-one".