6801816520 has 32 divisors (see below), whose sum is σ = 15345820800. Its totient is φ = 2713307328.

The previous prime is 6801816493. The next prime is 6801816521. The reversal of 6801816520 is 256181086.

It is a self number, because there is not a number n which added to its sum of digits gives 6801816520.

It is not an unprimeable number, because it can be changed into a prime (6801816521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216990 + ... + 246349.

It is an arithmetic number, because the mean of its divisors is an integer number (479556900).

Almost surely, 2^6801816520 is an apocalyptic number.

It is an amenable number.

6801816520 is an abundant number, since it is smaller than the sum of its proper divisors (8544004280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6801816520 is a wasteful number, since it uses less digits than its factorization.

6801816520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463717 (or 463713 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 6801816520 is about 82473.1260472161. The cubic root of 6801816520 is about 1894.7051585383.

The spelling of 6801816520 in words is "six billion, eight hundred one million, eight hundred sixteen thousand, five hundred twenty".