43968191436 has 144 divisors (see below), whose sum is σ = 124446766080. Its totient is φ = 12997480320.

The previous prime is 43968191429. The next prime is 43968191437. The reversal of 43968191436 is 63419186934.

43968191436 is a `hidden beast` number, since 43 + 9 + 6 + 81 + 91 + 436 = 666.

It is not an unprimeable number, because it can be changed into a prime (43968191437) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2005711 + ... + 2027513.

Almost surely, 2^43968191436 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 43968191436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62223383040).

43968191436 is an abundant number, since it is smaller than the sum of its proper divisors (80478574644).

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

43968191436 is a wasteful number, since it uses less digits than its factorization.

43968191436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21996 (or 21991 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 43968191436 in words is "forty-three billion, nine hundred sixty-eight million, one hundred ninety-one thousand, four hundred thirty-six".