8215783056 has 120 divisors (see below), whose sum is σ = 25615469880. Its totient is φ = 2440747008.

The previous prime is 8215783021. The next prime is 8215783063. The reversal of 8215783056 is 6503875128.

8215783056 is a `hidden beast` number, since 8 + 21 + 578 + 3 + 0 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2558336400 + 5657446656 = 50580^2 + 75216^2 .

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 23 ways as a sum of consecutive naturals, for example, 21381 + ... + 129956.

It is an arithmetic number, because the mean of its divisors is an integer number (213462249).

Almost surely, 2^8215783056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8215783056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12807734940).

8215783056 is an abundant number, since it is smaller than the sum of its proper divisors (17399686824).

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

8215783056 is a wasteful number, since it uses less digits than its factorization.

8215783056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151393 (or 151384 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 8215783056 is about 90640.9568351967. The cubic root of 8215783056 is about 2017.8226265509.

The spelling of 8215783056 in words is "eight billion, two hundred fifteen million, seven hundred eighty-three thousand, fifty-six".