825825818 has 4 divisors (see below), whose sum is σ = 1238738730. Its totient is φ = 412912908.

The previous prime is 825825817. The next prime is 825825839. The reversal of 825825818 is 818528528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 760490929 + 65334889 = 27577^2 + 8083^2 .

It is not an unprimeable number, because it can be changed into a prime (825825817) 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 as a sum of consecutive naturals, namely, 206456453 + ... + 206456456.

Almost surely, 2^825825818 is an apocalyptic number.

825825818 is a deficient number, since it is larger than the sum of its proper divisors (412912912).

825825818 is a wasteful number, since it uses less digits than its factorization.

825825818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412912911.

The product of its digits is 409600, while the sum is 47.

The square root of 825825818 is about 28737.1852831832. The cubic root of 825825818 is about 938.2015628777.

The spelling of 825825818 in words is "eight hundred twenty-five million, eight hundred twenty-five thousand, eight hundred eighteen".