6809894556 has 24 divisors (see below), whose sum is σ = 16580613504. Its totient is φ = 2171270640.

The previous prime is 6809894513. The next prime is 6809894617. The reversal of 6809894556 is 6554989086.

It is a self number, because there is not a number n which added to its sum of digits gives 6809894556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12336490 + ... + 12337041.

It is an arithmetic number, because the mean of its divisors is an integer number (690858896).

Almost surely, 2^6809894556 is an apocalyptic number.

It is an amenable number.

6809894556 is an abundant number, since it is smaller than the sum of its proper divisors (9770718948).

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

6809894556 is a wasteful number, since it uses less digits than its factorization.

6809894556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24673561 (or 24673559 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 60.

The square root of 6809894556 is about 82522.0852620679. The cubic root of 6809894556 is about 1895.4549308648.

The spelling of 6809894556 in words is "six billion, eight hundred nine million, eight hundred ninety-four thousand, five hundred fifty-six".