825448829421 has 32 divisors (see below), whose sum is σ = 1124314732800. Its totient is φ = 538569884160.

The previous prime is 825448829417. The next prime is 825448829497. The reversal of 825448829421 is 124928844528.

It is not a de Polignac number, because 825448829421 - 2² = 825448829417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825448827421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15845265 + ... + 15897273.

It is an arithmetic number, because the mean of its divisors is an integer number (35134835400).

Almost surely, 2^825448829421 is an apocalyptic number.

It is an amenable number.

825448829421 is a deficient number, since it is larger than the sum of its proper divisors (298865903379).

825448829421 is a wasteful number, since it uses less digits than its factorization.

825448829421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52629.

The product of its digits is 11796480, while the sum is 57.

The spelling of 825448829421 in words is "eight hundred twenty-five billion, four hundred forty-eight million, eight hundred twenty-nine thousand, four hundred twenty-one".