825669534561 has 4 divisors (see below), whose sum is σ = 1100892712752. Its totient is φ = 550446356372.

The previous prime is 825669534527. The next prime is 825669534593. The reversal of 825669534561 is 165435966528.

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.

It is a cyclic number.

It is not a de Polignac number, because 825669534561 - 2³³ = 817079599969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 825669534495 and 825669534504.

It is not an unprimeable number, because it can be changed into a prime (825669534061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137611589091 + ... + 137611589096.

It is an arithmetic number, because the mean of its divisors is an integer number (275223178188).

Almost surely, 2^825669534561 is an apocalyptic number.

It is an amenable number.

825669534561 is a deficient number, since it is larger than the sum of its proper divisors (275223178191).

825669534561 is a wasteful number, since it uses less digits than its factorization.

825669534561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275223178190.

The product of its digits is 46656000, while the sum is 60.

The spelling of 825669534561 in words is "eight hundred twenty-five billion, six hundred sixty-nine million, five hundred thirty-four thousand, five hundred sixty-one".