43320655872 has 540 divisors, whose sum is σ = 144462101056. Its totient is φ = 12899450880.

The previous prime is 43320655849. The next prime is 43320655877. The reversal of 43320655872 is 27855602334.

43320655872 is a `hidden beast` number, since 4 + 3 + 3 + 2 + 0 + 65 + 587 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (43320655877) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1397440497 + ... + 1397440527.

Almost surely, 2^43320655872 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 43320655872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72231050528).

43320655872 is an abundant number, since it is smaller than the sum of its proper divisors (101141445184).

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

43320655872 is an frugal number, since it uses more digits than its factorization.

43320655872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 43320655872 in words is "forty-three billion, three hundred twenty million, six hundred fifty-five thousand, eight hundred seventy-two".