6823561725 has 36 divisors (see below), whose sum is σ = 12251804500. Its totient is φ = 3630286080.

The previous prime is 6823561697. The next prime is 6823561729. The reversal of 6823561725 is 5271653286.

6823561725 is a `hidden beast` number, since 6 + 8 + 2 + 3 + 5 + 617 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 168428484 + 6655133241 = 12978^2 + 81579^2 .

It is not a de Polignac number, because 6823561725 - 2⁸ = 6823561469 is a prime.

It is a super-2 number, since 2×6823561725² = 93121989229769951250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6823561729) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54951 + ... + 129099.

Almost surely, 2^6823561725 is an apocalyptic number.

It is an amenable number.

6823561725 is a deficient number, since it is larger than the sum of its proper divisors (5428242775).

6823561725 is a wasteful number, since it uses less digits than its factorization.

6823561725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74574 (or 74566 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 6823561725 is about 82604.8529143415. The cubic root of 6823561725 is about 1896.7221160144.

It can be divided in two parts, 6823561 and 725, that added together give a palindrome (6824286).

The spelling of 6823561725 in words is "six billion, eight hundred twenty-three million, five hundred sixty-one thousand, seven hundred twenty-five".