9911397136 has 15 divisors (see below), whose sum is σ = 19204103541. Its totient is φ = 4955499456.

The previous prime is 9911397073. The next prime is 9911397169. The reversal of 9911397136 is 6317931199.

The square root of 9911397136 is 99556.

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., 38987536 + 9872409600 = 6244^2 + 99360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9911397136.

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, 385780 + ... + 410668.

Almost surely, 2^9911397136 is an apocalyptic number.

9911397136 is the 99556-th square number.

It is an amenable number.

9911397136 is a deficient number, since it is larger than the sum of its proper divisors (9292706405).

9911397136 is an frugal number, since it uses more digits than its factorization.

9911397136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49786 (or 24891 counting only the distinct ones).

The product of its digits is 275562, while the sum is 49.

The cubic root of 9911397136 is about 2148.0528349391.

Multiplying 9911397136 by its sum of digits (49), we get a square (485658459664 = 696892²).

It can be divided in two parts, 99113 and 97136, that added together give a square (196249 = 443²).

The spelling of 9911397136 in words is "nine billion, nine hundred eleven million, three hundred ninety-seven thousand, one hundred thirty-six".