43540000056 has 96 divisors (see below), whose sum is σ = 134924175360. Its totient is φ = 12425461056.

The previous prime is 43540000043. The next prime is 43540000067. The reversal of 43540000056 is 65000004534.

43540000056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 43539999984 and 43540000029.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384901 + ... + 485003.

It is an arithmetic number, because the mean of its divisors is an integer number (1405460160).

Almost surely, 2^43540000056 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 43540000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67462087680).

43540000056 is an abundant number, since it is smaller than the sum of its proper divisors (91384175304).

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

43540000056 is a wasteful number, since it uses less digits than its factorization.

43540000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100985 (or 100978 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 43540000056 in words is "forty-three billion, five hundred forty million, fifty-six", and thus it is an aban number.