822440406549 has 4 divisors (see below), whose sum is σ = 1096587208736. Its totient is φ = 548293604364.

The previous prime is 822440406533. The next prime is 822440406611. The reversal of 822440406549 is 945604044228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 822440406549 - 2⁴ = 822440406533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 822440406498 and 822440406507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822440406509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137073401089 + ... + 137073401094.

It is an arithmetic number, because the mean of its divisors is an integer number (274146802184).

Almost surely, 2^822440406549 is an apocalyptic number.

It is an amenable number.

822440406549 is a deficient number, since it is larger than the sum of its proper divisors (274146802187).

822440406549 is a wasteful number, since it uses less digits than its factorization.

822440406549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274146802186.

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 822440406549 in words is "eight hundred twenty-two billion, four hundred forty million, four hundred six thousand, five hundred forty-nine".