828521750825 has 24 divisors (see below), whose sum is σ = 1043311502808. Its totient is φ = 652563233280.

The previous prime is 828521750813. The next prime is 828521750857. The reversal of 828521750825 is 528057125828.

It is a happy number.

828521750825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 159024690841 + 669497059984 = 398779^2 + 818228^2 .

It is not a de Polignac number, because 828521750825 - 2⁸ = 828521750569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608999 + ... + 1424051.

It is an arithmetic number, because the mean of its divisors is an integer number (43471312617).

Almost surely, 2^828521750825 is an apocalyptic number.

It is an amenable number.

828521750825 is a deficient number, since it is larger than the sum of its proper divisors (214789751983).

828521750825 is a wasteful number, since it uses less digits than its factorization.

828521750825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815693 (or 815688 counting only the distinct ones).

The product of its (nonzero) digits is 3584000, while the sum is 53.

The spelling of 828521750825 in words is "eight hundred twenty-eight billion, five hundred twenty-one million, seven hundred fifty thousand, eight hundred twenty-five".