91191198328 has 16 divisors (see below), whose sum is σ = 171164063880. Its totient is φ = 45547447968.

The previous prime is 91191198311. The next prime is 91191198379. The reversal of 91191198328 is 82389119119.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6010851 + ... + 6026002.

Almost surely, 2^91191198328 is an apocalyptic number.

It is an amenable number.

91191198328 is a deficient number, since it is larger than the sum of its proper divisors (79972865552).

91191198328 is a wasteful number, since it uses less digits than its factorization.

91191198328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12037806 (or 12037802 counting only the distinct ones).

The product of its digits is 279936, while the sum is 52.

The spelling of 91191198328 in words is "ninety-one billion, one hundred ninety-one million, one hundred ninety-eight thousand, three hundred twenty-eight".