6803974011581 has 4 divisors (see below), whose sum is σ = 6803979241500. Its totient is φ = 6803968781664.

The previous prime is 6803974011577. The next prime is 6803974011599. The reversal of 6803974011581 is 1851104793086.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2644311785956 + 4159662225625 = 1626134^2 + 2039525^2 .

It is a cyclic number.

It is not a de Polignac number, because 6803974011581 - 2² = 6803974011577 is a prime.

It is a super-4 number, since 4×6803974011581⁴ (a number of 52 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6803974011481) 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, 1030745 + ... + 3830193.

It is an arithmetic number, because the mean of its divisors is an integer number (1700994810375).

Almost surely, 2^{6803974011581} is an apocalyptic number.

It is an amenable number.

6803974011581 is a deficient number, since it is larger than the sum of its proper divisors (5229919).

6803974011581 is a wasteful number, since it uses less digits than its factorization.

6803974011581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5229918.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 6803974011581 in words is "six trillion, eight hundred three billion, nine hundred seventy-four million, eleven thousand, five hundred eighty-one".