91800099443 has 8 divisors (see below), whose sum is σ = 100482329136. Its totient is φ = 83349396000.

The previous prime is 91800099431. The next prime is 91800099509. The reversal of 91800099443 is 34499000819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91800099443 - 2⁴ = 91800099427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91800093443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57880733 + ... + 57882318.

It is an arithmetic number, because the mean of its divisors is an integer number (12560291142).

Almost surely, 2^91800099443 is an apocalyptic number.

91800099443 is a deficient number, since it is larger than the sum of its proper divisors (8682229693).

91800099443 is a wasteful number, since it uses less digits than its factorization.

91800099443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115763125.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 91800099443 in words is "ninety-one billion, eight hundred million, ninety-nine thousand, four hundred forty-three".