9999191004992 has 56 divisors (see below), whose sum is σ = 24010662452544. Its totient is φ = 4033287124992.

The previous prime is 9999191004911. The next prime is 9999191005109. The reversal of 9999191004992 is 2994001919999.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656451878 + ... + 656467109.

Almost surely, 2^{9999191004992} is an apocalyptic number.

It is an amenable number.

9999191004992 is an abundant number, since it is smaller than the sum of its proper divisors (14011471447552).

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

9999191004992 is a wasteful number, since it uses less digits than its factorization.

9999191004992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312919023 (or 1312919013 counting only the distinct ones).

The product of its (nonzero) digits is 38263752, while the sum is 71.

The spelling of 9999191004992 in words is "nine trillion, nine hundred ninety-nine billion, one hundred ninety-one million, four thousand, nine hundred ninety-two".