825621831884764 has 24 divisors (see below), whose sum is σ = 1445289699934080. Its totient is φ = 412681928262144.

The previous prime is 825621831884741. The next prime is 825621831884779. The reversal of 825621831884764 is 467488138126528.

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311816592 + ... + 314453224.

It is an arithmetic number, because the mean of its divisors is an integer number (60220404163920).

Almost surely, 2^{825621831884764} is an apocalyptic number.

It is an amenable number.

825621831884764 is a deficient number, since it is larger than the sum of its proper divisors (619667868049316).

825621831884764 is a wasteful number, since it uses less digits than its factorization.

825621831884764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661069 (or 2661067 counting only the distinct ones).

The product of its digits is 990904320, while the sum is 73.

The spelling of 825621831884764 in words is "eight hundred twenty-five trillion, six hundred twenty-one billion, eight hundred thirty-one million, eight hundred eighty-four thousand, seven hundred sixty-four".