9994884668691 has 32 divisors (see below), whose sum is σ = 14360430470400. Its totient is φ = 6146927606400.

The previous prime is 9994884668669. The next prime is 9994884668731. The reversal of 9994884668691 is 1968664884999.

9994884668691 = T₁ + T₂ + ... + T₃₉₁₄₁.

9994884668691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

9994884668691 is a nontrivial binomial coefficient, being equal to C(39143, 3).

It is not a de Polignac number, because 9994884668691 - 2¹³ = 9994884660499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9994884668598 and 9994884668607.

It is not an unprimeable number, because it can be changed into a prime (9994884668651) by changing a digit.

It is the 39141-st tetrahedral number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510688936 + ... + 510708506.

It is an arithmetic number, because the mean of its divisors is an integer number (448763452200).

Almost surely, 2^{9994884668691} is an apocalyptic number.

9994884668691 is a deficient number, since it is larger than the sum of its proper divisors (4365545801709).

9994884668691 is a wasteful number, since it uses less digits than its factorization.

9994884668691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26947.

The product of its digits is 11609505792, while the sum is 87.

The spelling of 9994884668691 in words is "nine trillion, nine hundred ninety-four billion, eight hundred eighty-four million, six hundred sixty-eight thousand, six hundred ninety-one".