9999990999999 has 192 divisors, whose sum is σ = 20583588336640. Its totient is φ = 4665595334400.

The previous prime is 9999990999961. The next prime is 9999991000057.

9999990999999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9999990999999 - 2¹³ = 9999990991807 is a prime.

It is a super-2 number, since 2×9999990999999² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9999990999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999990999799) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10545444 + ... + 11454534.

Almost surely, 2^{9999990999999} is an apocalyptic number.

9999990999999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9999990999999 is an abundant number, since it is smaller than the sum of its proper divisors (10583597336641).

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

9999990999999 is a wasteful number, since it uses less digits than its factorization.

9999990999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909179 (or 909162 counting only the distinct ones).

The product of its (nonzero) digits is 282429536481, while the sum is 108.

The spelling of 9999990999999 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety million, nine hundred ninety-nine thousand, nine hundred ninety-nine".