825328206520 has 64 divisors (see below), whose sum is σ = 1870027236000. Its totient is φ = 327814648320.

The previous prime is 825328206511. The next prime is 825328206641. The reversal of 825328206520 is 25602823528.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21084807 + ... + 21123913.

Almost surely, 2^825328206520 is an apocalyptic number.

It is an amenable number.

825328206520 is an abundant number, since it is smaller than the sum of its proper divisors (1044699029480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825328206520 is a wasteful number, since it uses less digits than its factorization.

825328206520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42808 (or 42804 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 825328206520 in words is "eight hundred twenty-five billion, three hundred twenty-eight million, two hundred six thousand, five hundred twenty".