825644481 has 8 divisors (see below), whose sum is σ = 1107010080. Its totient is φ = 547354272.

The previous prime is 825644461. The next prime is 825644489. The reversal of 825644481 is 184446528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 825644481 - 2⁷ = 825644353 is a prime.

It is a super-2 number, since 2×825644481² = 1363377618011518722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (825644489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768220 + ... + 769293.

It is an arithmetic number, because the mean of its divisors is an integer number (138376260).

Almost surely, 2^825644481 is an apocalyptic number.

It is an amenable number.

825644481 is a deficient number, since it is larger than the sum of its proper divisors (281365599).

825644481 is a wasteful number, since it uses less digits than its factorization.

825644481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537695.

The product of its digits is 245760, while the sum is 42.

The square root of 825644481 is about 28734.0300166893. The cubic root of 825644481 is about 938.1328869305.

The spelling of 825644481 in words is "eight hundred twenty-five million, six hundred forty-four thousand, four hundred eighty-one".