43091198891 has 16 divisors (see below), whose sum is σ = 47577535488. Its totient is φ = 38773862400.

The previous prime is 43091198879. The next prime is 43091198929. The reversal of 43091198891 is 19889119034.

It is not a de Polignac number, because 43091198891 - 2²⁶ = 43024090027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43091198291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615446 + ... + 681876.

It is an arithmetic number, because the mean of its divisors is an integer number (2973595968).

Almost surely, 2^43091198891 is an apocalyptic number.

43091198891 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

43091198891 is a deficient number, since it is larger than the sum of its proper divisors (4486336597).

43091198891 is a wasteful number, since it uses less digits than its factorization.

43091198891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67702.

The product of its (nonzero) digits is 559872, while the sum is 53.

The spelling of 43091198891 in words is "forty-three billion, ninety-one million, one hundred ninety-eight thousand, eight hundred ninety-one".