825466561 has 4 divisors (see below), whose sum is σ = 825524224. Its totient is φ = 825408900.

The previous prime is 825466549. The next prime is 825466583. The reversal of 825466561 is 165664528.

825466561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 825466561 - 2⁵ = 825466529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825460561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10816 + ... + 42046.

It is an arithmetic number, because the mean of its divisors is an integer number (206381056).

Almost surely, 2^825466561 is an apocalyptic number.

It is an amenable number.

825466561 is a deficient number, since it is larger than the sum of its proper divisors (57663).

825466561 is a wasteful number, since it uses less digits than its factorization.

825466561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57662.

The product of its digits is 345600, while the sum is 43.

The square root of 825466561 is about 28730.9338692636. The cubic root of 825466561 is about 938.0654952956.

The spelling of 825466561 in words is "eight hundred twenty-five million, four hundred sixty-six thousand, five hundred sixty-one".