6891227849 has 16 divisors (see below), whose sum is σ = 7643782080. Its totient is φ = 6160028160.

The previous prime is 6891227839. The next prime is 6891227873. The reversal of 6891227849 is 9487221986.

6891227849 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6891227849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6891227794 and 6891227803.

It is not an unprimeable number, because it can be changed into a prime (6891227809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411137 + ... + 427569.

It is an arithmetic number, because the mean of its divisors is an integer number (477736380).

Almost surely, 2^6891227849 is an apocalyptic number.

It is an amenable number.

6891227849 is a deficient number, since it is larger than the sum of its proper divisors (752554231).

6891227849 is a wasteful number, since it uses less digits than its factorization.

6891227849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17080.

The product of its digits is 3483648, while the sum is 56.

The square root of 6891227849 is about 83013.4196922401. The cubic root of 6891227849 is about 1902.9711454158.

The spelling of 6891227849 in words is "six billion, eight hundred ninety-one million, two hundred twenty-seven thousand, eight hundred forty-nine".