99191313739872 has 96 divisors (see below), whose sum is σ = 289310810866560. Its totient is φ = 33063449823360.

The previous prime is 99191313739849. The next prime is 99191313739901. The reversal of 99191313739872 is 27893731319199.

99191313739872 is a `hidden beast` number, since 9 + 9 + 1 + 9 + 131 + 37 + 398 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×99191313739872² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 99191313739872.

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 15 ways as a sum of consecutive naturals, for example, 98550847 + ... + 99552257.

It is an arithmetic number, because the mean of its divisors is an integer number (3013654279860).

Almost surely, 2^{99191313739872} is an apocalyptic number.

It is an amenable number.

99191313739872 is an abundant number, since it is smaller than the sum of its proper divisors (190119497126688).

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

99191313739872 is a wasteful number, since it uses less digits than its factorization.

99191313739872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116073 (or 1116059 counting only the distinct ones).

The product of its digits is 138883248, while the sum is 72.

The spelling of 99191313739872 in words is "ninety-nine trillion, one hundred ninety-one billion, three hundred thirteen million, seven hundred thirty-nine thousand, eight hundred seventy-two".