99191440917125 has 16 divisors (see below), whose sum is σ = 124019737052016. Its totient is φ = 79206474024000.

The previous prime is 99191440917109. The next prime is 99191440917133. The reversal of 99191440917125 is 52171904419199.

It can be written as a sum of positive squares in 8 ways, for example, as 64650701600356 + 34540739316769 = 8040566^2 + 5877137^2 .

It is not a de Polignac number, because 99191440917125 - 2⁴ = 99191440917109 is a prime.

It is a super-2 number, since 2×99191440917125² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 733325654 + ... + 733460903.

It is an arithmetic number, because the mean of its divisors is an integer number (7751233565751).

Almost surely, 2^{99191440917125} is an apocalyptic number.

It is an amenable number.

99191440917125 is a deficient number, since it is larger than the sum of its proper divisors (24828296134891).

99191440917125 is a wasteful number, since it uses less digits than its factorization.

99191440917125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466787113 (or 1466787103 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 62.

The spelling of 99191440917125 in words is "ninety-nine trillion, one hundred ninety-one billion, four hundred forty million, nine hundred seventeen thousand, one hundred twenty-five".