9986191902123 has 8 divisors (see below), whose sum is σ = 13364055092736. Its totient is φ = 6632894989800.

The previous prime is 9986191902091. The next prime is 9986191902133. The reversal of 9986191902123 is 3212091916899.

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

It is not a de Polignac number, because 9986191902123 - 2⁵ = 9986191902091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9986191902133) 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, 6141568623 + ... + 6141570248.

It is an arithmetic number, because the mean of its divisors is an integer number (1670506886592).

Almost surely, 2^{9986191902123} is an apocalyptic number.

9986191902123 is a deficient number, since it is larger than the sum of its proper divisors (3377863190613).

9986191902123 is a wasteful number, since it uses less digits than its factorization.

9986191902123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12283139145.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 9986191902123 in words is "nine trillion, nine hundred eighty-six billion, one hundred ninety-one million, nine hundred two thousand, one hundred twenty-three".