822855645 has 16 divisors (see below), whose sum is σ = 1462854720. Its totient is φ = 438856272.

The previous prime is 822855637. The next prime is 822855653. The reversal of 822855645 is 546558228.

It is a happy number.

822855645 is a `hidden beast` number, since 8 + 2 + 2 + 85 + 564 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (822855637) and next prime (822855653).

It is not a de Polignac number, because 822855645 - 2³ = 822855637 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 822855645.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3047479 + ... + 3047748.

It is an arithmetic number, because the mean of its divisors is an integer number (91428420).

Almost surely, 2^822855645 is an apocalyptic number.

It is an amenable number.

822855645 is a deficient number, since it is larger than the sum of its proper divisors (639999075).

822855645 is a wasteful number, since it uses less digits than its factorization.

822855645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095241 (or 6095235 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 822855645 is about 28685.4605157386. The cubic root of 822855645 is about 937.0754301522.

The spelling of 822855645 in words is "eight hundred twenty-two million, eight hundred fifty-five thousand, six hundred forty-five".