8369645856 has 384 divisors, whose sum is σ = 27116716032. Its totient is φ = 2225664000.

The previous prime is 8369645827. The next prime is 8369645897. The reversal of 8369645856 is 6585469638.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8369645856.

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 63 ways as a sum of consecutive naturals, for example, 30215190 + ... + 30215466.

It is an arithmetic number, because the mean of its divisors is an integer number (70616448).

Almost surely, 2^8369645856 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 8369645856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13558358016).

8369645856 is an abundant number, since it is smaller than the sum of its proper divisors (18747070176).

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

8369645856 is a wasteful number, since it uses less digits than its factorization.

8369645856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 408 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 60.

The square root of 8369645856 is about 91485.7685981814. The cubic root of 8369645856 is about 2030.3411994937.

The spelling of 8369645856 in words is "eight billion, three hundred sixty-nine million, six hundred forty-five thousand, eight hundred fifty-six".