825040351640 has 32 divisors (see below), whose sum is σ = 1856372618880. Its totient is φ = 330010482432.

The previous prime is 825040351601. The next prime is 825040351669. The reversal of 825040351640 is 46153040528.

It is a junction number, because it is equal to n+sod(n) for n = 825040351594 and 825040351603.

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, 2806937 + ... + 3086903.

It is an arithmetic number, because the mean of its divisors is an integer number (58011644340).

Almost surely, 2^825040351640 is an apocalyptic number.

It is an amenable number.

825040351640 is an abundant number, since it is smaller than the sum of its proper divisors (1031332267240).

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

825040351640 is a wasteful number, since it uses less digits than its factorization.

825040351640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353651 (or 353647 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 825040351640 in words is "eight hundred twenty-five billion, forty million, three hundred fifty-one thousand, six hundred forty".