99990000009999 has 72 divisors (see below), whose sum is σ = 159186079324272. Its totient is φ = 59980910400000.

The previous prime is 99990000009989. The next prime is 99990000010031.

99990000009999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99990000009999 - 2¹¹ = 99990000007951 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990000009989) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3576038379 + ... + 3576066339.

Almost surely, 2^{99990000009999} is an apocalyptic number.

99990000009999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99990000009999 is a deficient number, since it is larger than the sum of its proper divisors (59196079314273).

99990000009999 is a wasteful number, since it uses less digits than its factorization.

99990000009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31721 (or 31617 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 72.

It can be divided in two parts, 9999000000 and 9999, that multiplied together give a square (99980001000000 = 9999000²).

The spelling of 99990000009999 in words is "ninety-nine trillion, nine hundred ninety billion, nine thousand, nine hundred ninety-nine".