9536911299721 has 81 divisors (see below), whose sum is σ = 10920175611093. Its totient is φ = 8324769323520.

The previous prime is 9536911299701. The next prime is 9536911299733. The reversal of 9536911299721 is 1279921196359.

The square root of 9536911299721 is 3088189.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1742429040121 + 7794482259600 = 1320011^2 + 2791860^2 .

It is not a de Polignac number, because 9536911299721 - 2¹¹ = 9536911297673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9536911299701) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 98318673145 + ... + 98318673241.

It is an arithmetic number, because the mean of its divisors is an integer number (134816982853).

Almost surely, 2^{9536911299721} is an apocalyptic number.

9536911299721 is the 3088189-th square number.

9536911299721 is the 1544095-th centered octagonal number.

It is an amenable number.

9536911299721 is a deficient number, since it is larger than the sum of its proper divisors (1383264311372).

9536911299721 is an frugal number, since it uses more digits than its factorization.

9536911299721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 220 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 64.

Multiplying 9536911299721 by its sum of digits (64), we get a square (610362323182144 = 24705512²).

The spelling of 9536911299721 in words is "nine trillion, five hundred thirty-six billion, nine hundred eleven million, two hundred ninety-nine thousand, seven hundred twenty-one".