8271688849 has 4 divisors (see below), whose sum is σ = 8273282020. Its totient is φ = 8270095680.

The previous prime is 8271688847. The next prime is 8271688897. The reversal of 8271688849 is 9488861728.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8212890625 + 58798224 = 90625^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 8271688849 - 2¹ = 8271688847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8271688847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788772 + ... + 799189.

It is an arithmetic number, because the mean of its divisors is an integer number (2068320505).

Almost surely, 2^8271688849 is an apocalyptic number.

It is an amenable number.

8271688849 is a deficient number, since it is larger than the sum of its proper divisors (1593171).

8271688849 is a wasteful number, since it uses less digits than its factorization.

8271688849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593170.

The product of its digits is 12386304, while the sum is 61.

The square root of 8271688849 is about 90948.8254404640. The cubic root of 8271688849 is about 2022.3891648062.

The spelling of 8271688849 in words is "eight billion, two hundred seventy-one million, six hundred eighty-eight thousand, eight hundred forty-nine".