9879127899664 has 15 divisors (see below), whose sum is σ = 19140834664717. Its totient is φ = 4939557663616.

The previous prime is 9879127899649. The next prime is 9879127899671. The reversal of 9879127899664 is 4669987219789.

The square root of 9879127899664 is 3143108.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6530989136400 + 3348138763264 = 2555580^2 + 1829792^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12179544 + ... + 12965320.

Almost surely, 2^{9879127899664} is an apocalyptic number.

9879127899664 is the 3143108-th square number.

It is an amenable number.

9879127899664 is a deficient number, since it is larger than the sum of its proper divisors (9261706765053).

9879127899664 is an frugal number, since it uses more digits than its factorization.

9879127899664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571562 (or 785779 counting only the distinct ones).

The product of its digits is 5925685248, while the sum is 85.

The spelling of 9879127899664 in words is "nine trillion, eight hundred seventy-nine billion, one hundred twenty-seven million, eight hundred ninety-nine thousand, six hundred sixty-four".