825553109 has 16 divisors (see below), whose sum is σ = 848601600. Its totient is φ = 802938096.

The previous prime is 825553103. The next prime is 825553111. The reversal of 825553109 is 901355528.

825553109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 825553109 - 2⁸ = 825552853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825553103) 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, 1880312 + ... + 1880750.

It is an arithmetic number, because the mean of its divisors is an integer number (53037600).

Almost surely, 2^825553109 is an apocalyptic number.

It is an amenable number.

825553109 is a deficient number, since it is larger than the sum of its proper divisors (23048491).

825553109 is a wasteful number, since it uses less digits than its factorization.

825553109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 825553109 is about 28732.4400112486. The cubic root of 825553109 is about 938.0982787174.

The spelling of 825553109 in words is "eight hundred twenty-five million, five hundred fifty-three thousand, one hundred nine".