43158315816 has 576 divisors, whose sum is σ = 155918730240. Its totient is φ = 10538035200.

The previous prime is 43158315797. The next prime is 43158315821. The reversal of 43158315816 is 61851385134.

43158315816 is a `hidden beast` number, since 4 + 3 + 1 + 583 + 1 + 58 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 69948340 + ... + 69948956.

It is an arithmetic number, because the mean of its divisors is an integer number (270692240).

Almost surely, 2^43158315816 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 43158315816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77959365120).

43158315816 is an abundant number, since it is smaller than the sum of its proper divisors (112760414424).

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

43158315816 is a wasteful number, since it uses less digits than its factorization.

43158315816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 708 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 43158315816 in words is "forty-three billion, one hundred fifty-eight million, three hundred fifteen thousand, eight hundred sixteen".