3815816586822 has 96 divisors (see below), whose sum is σ = 8925670091520. Its totient is φ = 1174428590400.

The previous prime is 3815816586821. The next prime is 3815816586833. The reversal of 3815816586822 is 2286856185183.

It is a happy number.

3815816586822 is a `hidden beast` number, since 3 + 8 + 15 + 8 + 16 + 586 + 8 + 22 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3815816586822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3815816586821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2039953 + ... + 3434099.

It is an arithmetic number, because the mean of its divisors is an integer number (92975730120).

Almost surely, 2^{3815816586822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3815816586822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4462835045760).

3815816586822 is an abundant number, since it is smaller than the sum of its proper divisors (5109853504698).

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

3815816586822 is a wasteful number, since it uses less digits than its factorization.

3815816586822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394378 (or 1394375 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 63.

The spelling of 3815816586822 in words is "three trillion, eight hundred fifteen billion, eight hundred sixteen million, five hundred eighty-six thousand, eight hundred twenty-two".