825321822449 has 4 divisors (see below), whose sum is σ = 873870164964. Its totient is φ = 776773479936.

The previous prime is 825321822443. The next prime is 825321822461. The reversal of 825321822449 is 944228123528.

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 649848801424 + 175473021025 = 806132^2 + 418895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825321822449 is a prime.

It is a super-2 number, since 2×825321822449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 825321822397 and 825321822406.

It is not an unprimeable number, because it can be changed into a prime (825321822443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24274171232 + ... + 24274171265.

It is an arithmetic number, because the mean of its divisors is an integer number (218467541241).

Almost surely, 2^825321822449 is an apocalyptic number.

It is an amenable number.

825321822449 is a deficient number, since it is larger than the sum of its proper divisors (48548342515).

825321822449 is a wasteful number, since it uses less digits than its factorization.

825321822449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48548342514.

The product of its digits is 2211840, while the sum is 50.

The spelling of 825321822449 in words is "eight hundred twenty-five billion, three hundred twenty-one million, eight hundred twenty-two thousand, four hundred forty-nine".