99368081891 has 8 divisors (see below), whose sum is σ = 107014350240. Its totient is φ = 91722180672.

The previous prime is 99368081867. The next prime is 99368081899. The reversal of 99368081891 is 19818086399.

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

It is a cyclic number.

It is not a de Polignac number, because 99368081891 - 2²⁶ = 99300973027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99368081899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 770375 + ... + 890063.

It is an arithmetic number, because the mean of its divisors is an integer number (13376793780).

Almost surely, 2^99368081891 is an apocalyptic number.

99368081891 is a deficient number, since it is larger than the sum of its proper divisors (7646268349).

99368081891 is a wasteful number, since it uses less digits than its factorization.

99368081891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183565.

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 99368081891 in words is "ninety-nine billion, three hundred sixty-eight million, eighty-one thousand, eight hundred ninety-one".