6809120525 has 6 divisors (see below), whose sum is σ = 8443309482. Its totient is φ = 5447296400.

The previous prime is 6809120509. The next prime is 6809120561. The reversal of 6809120525 is 5250219086.

It can be written as a sum of positive squares in 3 ways, for example, as 3200521 + 6805920004 = 1789^2 + 82498^2 .

It is not a de Polignac number, because 6809120525 - 2⁴ = 6809120509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136182386 + ... + 136182435.

It is an arithmetic number, because the mean of its divisors is an integer number (1407218247).

Almost surely, 2^6809120525 is an apocalyptic number.

It is an amenable number.

6809120525 is a deficient number, since it is larger than the sum of its proper divisors (1634188957).

6809120525 is a wasteful number, since it uses less digits than its factorization.

6809120525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272364831 (or 272364826 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 6809120525 is about 82517.3952872968. The cubic root of 6809120525 is about 1895.3831139689.

The spelling of 6809120525 in words is "six billion, eight hundred nine million, one hundred twenty thousand, five hundred twenty-five".