43881054126 has 128 divisors (see below), whose sum is σ = 114494155776. Its totient is φ = 10880317440.

The previous prime is 43881054083. The next prime is 43881054193. The reversal of 43881054126 is 62145018834.

It is a happy number.

It is a super-2 number, since 2×43881054126² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10960041 + ... + 10964043.

It is an arithmetic number, because the mean of its divisors is an integer number (894485592).

Almost surely, 2^43881054126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43881054126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57247077888).

43881054126 is an abundant number, since it is smaller than the sum of its proper divisors (70613101650).

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

43881054126 is a wasteful number, since it uses less digits than its factorization.

43881054126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 43881054126 in words is "forty-three billion, eight hundred eighty-one million, fifty-four thousand, one hundred twenty-six".