43691216128 has 108 divisors (see below), whose sum is σ = 101911877760. Its totient is φ = 18639645696.

The previous prime is 43691216071. The next prime is 43691216141. The reversal of 43691216128 is 82161219634.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2789503 + ... + 2805121.

Almost surely, 2^43691216128 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 43691216128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50955938880).

43691216128 is an abundant number, since it is smaller than the sum of its proper divisors (58220661632).

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

43691216128 is a wasteful number, since it uses less digits than its factorization.

43691216128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872 (or 15851 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The spelling of 43691216128 in words is "forty-three billion, six hundred ninety-one million, two hundred sixteen thousand, one hundred twenty-eight".