6891596568841 has 4 divisors (see below), whose sum is σ = 6931432387332. Its totient is φ = 6851760750352.

The previous prime is 6891596568839. The next prime is 6891596568881. The reversal of 6891596568841 is 1488656951986.

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 4524537393216 + 2367059175625 = 2127096^2 + 1538525^2 .

It is a cyclic number.

It is not a de Polignac number, because 6891596568841 - 2¹ = 6891596568839 is a prime.

It is a super-2 number, since 2×6891596568841² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6891596568811) 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 3 ways as a sum of consecutive naturals, for example, 19917908986 + ... + 19917909331.

It is an arithmetic number, because the mean of its divisors is an integer number (1732858096833).

Almost surely, 2^{6891596568841} is an apocalyptic number.

It is an amenable number.

6891596568841 is a deficient number, since it is larger than the sum of its proper divisors (39835818491).

6891596568841 is a wasteful number, since it uses less digits than its factorization.

6891596568841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39835818490.

The product of its digits is 895795200, while the sum is 76.

The spelling of 6891596568841 in words is "six trillion, eight hundred ninety-one billion, five hundred ninety-six million, five hundred sixty-eight thousand, eight hundred forty-one".