6803974507821 has 4 divisors (see below), whose sum is σ = 9071966010432. Its totient is φ = 4535983005212.

The previous prime is 6803974507801. The next prime is 6803974507853. The reversal of 6803974507821 is 1287054793086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6803974507821 - 2⁵ = 6803974507789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6803974507801) 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, 1133995751301 + ... + 1133995751306.

It is an arithmetic number, because the mean of its divisors is an integer number (2267991502608).

It is a 1-persistent number, because it is pandigital, but 2⋅6803974507821 = 13607949015642 is not.

Almost surely, 2^{6803974507821} is an apocalyptic number.

It is an amenable number.

6803974507821 is a deficient number, since it is larger than the sum of its proper divisors (2267991502611).

6803974507821 is a wasteful number, since it uses less digits than its factorization.

6803974507821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267991502610.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 6803974507821 in words is "six trillion, eight hundred three billion, nine hundred seventy-four million, five hundred seven thousand, eight hundred twenty-one".