825861785384 has 24 divisors (see below), whose sum is σ = 1557819192090. Its totient is φ = 410458141728.

The previous prime is 825861785369. The next prime is 825861785387. The reversal of 825861785384 is 483587168528.

It can be written as a sum of positive squares in only one way, i.e., 823516320484 + 2345464900 = 907478^2 + 48430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 825861785384.

It is not an unprimeable number, because it can be changed into a prime (825861785387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1627667 + ... + 2073890.

Almost surely, 2^825861785384 is an apocalyptic number.

It is an amenable number.

825861785384 is a deficient number, since it is larger than the sum of its proper divisors (731957406706).

825861785384 is a wasteful number, since it uses less digits than its factorization.

825861785384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701897 (or 3701726 counting only the distinct ones).

The product of its digits is 103219200, while the sum is 65.

The spelling of 825861785384 in words is "eight hundred twenty-five billion, eight hundred sixty-one million, seven hundred eighty-five thousand, three hundred eighty-four".