43123280256 has 480 divisors, whose sum is σ = 154487282400. Its totient is φ = 11892013056.

The previous prime is 43123280191. The next prime is 43123280261. The reversal of 43123280256 is 65208232134.

43123280256 is a `hidden beast` number, since 4 + 3 + 123 + 280 + 256 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 43123280256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 14731465 + ... + 14734391.

It is an arithmetic number, because the mean of its divisors is an integer number (321848505).

Almost surely, 2^43123280256 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 43123280256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77243641200).

43123280256 is an abundant number, since it is smaller than the sum of its proper divisors (111364002144).

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

43123280256 is a wasteful number, since it uses less digits than its factorization.

43123280256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 43123280256 in words is "forty-three billion, one hundred twenty-three million, two hundred eighty thousand, two hundred fifty-six".