8021382656 has 40 divisors (see below), whose sum is σ = 18316692240. Its totient is φ = 3437733888.

The previous prime is 8021382647. The next prime is 8021382661. The reversal of 8021382656 is 6562831208.

It is a super-2 number, since 2×8021382656² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115471 + ... + 1122638.

It is an arithmetic number, because the mean of its divisors is an integer number (457917306).

Almost surely, 2^8021382656 is an apocalyptic number.

It is an amenable number.

8021382656 is an abundant number, since it is smaller than the sum of its proper divisors (10295309584).

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

8021382656 is an equidigital number, since it uses as much as digits as its factorization.

8021382656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238134 (or 2238118 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 8021382656 is about 89562.1720147519. The cubic root of 8021382656 is about 2001.7803027908.

The spelling of 8021382656 in words is "eight billion, twenty-one million, three hundred eighty-two thousand, six hundred fifty-six".