43808821056 has 1792 divisors, whose sum is σ = 192262963200. Its totient is φ = 9405849600.

The previous prime is 43808821039. The next prime is 43808821057. The reversal of 43808821056 is 65012880834.

43808821056 is a `hidden beast` number, since 4 + 380 + 8 + 8 + 210 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43808821057) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1018809771 + ... + 1018809813.

It is an arithmetic number, because the mean of its divisors is an integer number (107289600).

Almost surely, 2^43808821056 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 43808821056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96131481600).

43808821056 is an abundant number, since it is smaller than the sum of its proper divisors (148454142144).

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

43808821056 is a wasteful number, since it uses less digits than its factorization.

43808821056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 43808821056 in words is "forty-three billion, eight hundred eight million, eight hundred twenty-one thousand, fifty-six".