9929664409 has 16 divisors (see below), whose sum is σ = 11855761920. Its totient is φ = 8136273600.

The previous prime is 9929664401. The next prime is 9929664421. The reversal of 9929664409 is 9044669299.

It is not a de Polignac number, because 9929664409 - 2³ = 9929664401 is a prime.

It is a super-2 number, since 2×9929664409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9929664401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221649 + ... + 262654.

It is an arithmetic number, because the mean of its divisors is an integer number (740985120).

Almost surely, 2^9929664409 is an apocalyptic number.

It is an amenable number.

9929664409 is a deficient number, since it is larger than the sum of its proper divisors (1926097511).

9929664409 is a wasteful number, since it uses less digits than its factorization.

9929664409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484440.

The product of its (nonzero) digits is 7558272, while the sum is 58.

The square root of 9929664409 is about 99647.7014737420. The cubic root of 9929664409 is about 2149.3716865283.

The spelling of 9929664409 in words is "nine billion, nine hundred twenty-nine million, six hundred sixty-four thousand, four hundred nine".