6891019011 has 12 divisors (see below), whose sum is σ = 10052246880. Its totient is φ = 4548526800.

The previous prime is 6891019007. The next prime is 6891019013. The reversal of 6891019011 is 1109101986.

It is not a de Polignac number, because 6891019011 - 2² = 6891019007 is a prime.

It is a super-2 number, since 2×6891019011² = 94972286019926836242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6891019013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3789531 + ... + 3791348.

It is an arithmetic number, because the mean of its divisors is an integer number (837687240).

Almost surely, 2^6891019011 is an apocalyptic number.

6891019011 is a deficient number, since it is larger than the sum of its proper divisors (3161227869).

6891019011 is a wasteful number, since it uses less digits than its factorization.

6891019011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7580986 (or 7580983 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 36.

The square root of 6891019011 is about 83012.1618258433. The cubic root of 6891019011 is about 1902.9519221021.

The spelling of 6891019011 in words is "six billion, eight hundred ninety-one million, nineteen thousand, eleven".