9964993781269 has 16 divisors (see below), whose sum is σ = 10338694973440. Its totient is φ = 9594589158000.

The previous prime is 9964993781261. The next prime is 9964993781291. The reversal of 9964993781269 is 9621873994699.

It is a cyclic number.

It is not a de Polignac number, because 9964993781269 - 2³ = 9964993781261 is a prime.

It is a super-2 number, since 2×9964993781269² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9964993781192 and 9964993781201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9964993781261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19176922 + ... + 19689700.

It is an arithmetic number, because the mean of its divisors is an integer number (646168435840).

Almost surely, 2^{9964993781269} is an apocalyptic number.

It is an amenable number.

9964993781269 is a deficient number, since it is larger than the sum of its proper divisors (373701192171).

9964993781269 is a wasteful number, since it uses less digits than its factorization.

9964993781269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515992.

The product of its digits is 2857026816, while the sum is 82.

The spelling of 9964993781269 in words is "nine trillion, nine hundred sixty-four billion, nine hundred ninety-three million, seven hundred eighty-one thousand, two hundred sixty-nine".