825050368729 has 4 divisors (see below), whose sum is σ = 825052250020. Its totient is φ = 825048487440.

The previous prime is 825050368721. The next prime is 825050368757. The reversal of 825050368729 is 927863050528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 710603478729 + 114446890000 = 842973^2 + 338300^2 .

It is a cyclic number.

It is not a de Polignac number, because 825050368729 - 2³ = 825050368721 is a prime.

It is a super-2 number, since 2×825050368729² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 825050368729.

It is not an unprimeable number, because it can be changed into a prime (825050368721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103627 + ... + 1288735.

It is an arithmetic number, because the mean of its divisors is an integer number (206263062505).

Almost surely, 2^825050368729 is an apocalyptic number.

It is an amenable number.

825050368729 is a deficient number, since it is larger than the sum of its proper divisors (1881291).

825050368729 is a wasteful number, since it uses less digits than its factorization.

825050368729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881290.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 825050368729 in words is "eight hundred twenty-five billion, fifty million, three hundred sixty-eight thousand, seven hundred twenty-nine".