825688899 has 24 divisors (see below), whose sum is σ = 1410046560. Its totient is φ = 455551488.

The previous prime is 825688889. The next prime is 825688907. The reversal of 825688899 is 998886528.

It is not a de Polignac number, because 825688899 - 2⁴ = 825688883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (825688819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224142 + ... + 227795.

It is an arithmetic number, because the mean of its divisors is an integer number (58751940).

Almost surely, 2^825688899 is an apocalyptic number.

825688899 is a deficient number, since it is larger than the sum of its proper divisors (584357661).

825688899 is a wasteful number, since it uses less digits than its factorization.

825688899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451979 (or 451976 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 63.

The square root of 825688899 is about 28734.8029225885. The cubic root of 825688899 is about 938.1497098449.

The spelling of 825688899 in words is "eight hundred twenty-five million, six hundred eighty-eight thousand, eight hundred ninety-nine".