6815420868 has 48 divisors (see below), whose sum is σ = 16436646464. Its totient is φ = 2196305280.

The previous prime is 6815420861. The next prime is 6815420893. The reversal of 6815420868 is 8680245186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6815420861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20823 + ... + 118593.

Almost surely, 2^6815420868 is an apocalyptic number.

It is an amenable number.

6815420868 is an abundant number, since it is smaller than the sum of its proper divisors (9621225596).

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

6815420868 is a wasteful number, since it uses less digits than its factorization.

6815420868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97972 (or 97970 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 6815420868 is about 82555.5623080601. The cubic root of 6815420868 is about 1895.9675204516.

The spelling of 6815420868 in words is "six billion, eight hundred fifteen million, four hundred twenty thousand, eight hundred sixty-eight".