6806135920 has 40 divisors (see below), whose sum is σ = 16657125840. Its totient is φ = 2579166720.

The previous prime is 6806135911. The next prime is 6806135923. The reversal of 6806135920 is 295316086.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6806135923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2237341 + ... + 2240380.

It is an arithmetic number, because the mean of its divisors is an integer number (416428146).

Almost surely, 2^6806135920 is an apocalyptic number.

It is an amenable number.

6806135920 is an abundant number, since it is smaller than the sum of its proper divisors (9850989920).

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

6806135920 is a wasteful number, since it uses less digits than its factorization.

6806135920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477753 (or 4477747 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6806135920 is about 82499.3086031635. The cubic root of 6806135920 is about 1895.1061424849.

The spelling of 6806135920 in words is "six billion, eight hundred six million, one hundred thirty-five thousand, nine hundred twenty".