11602831909 has 4 divisors (see below), whose sum is σ = 11623663404. Its totient is φ = 11582000416.

The previous prime is 11602831829. The next prime is 11602831939. The reversal of 11602831909 is 90913820611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7449416100 + 4153415809 = 86310^2 + 64447^2 .

It is a cyclic number.

It is not a de Polignac number, because 11602831909 - 2⁹ = 11602831397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11602831939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10414912 + ... + 10416025.

It is an arithmetic number, because the mean of its divisors is an integer number (2905915851).

Almost surely, 2^11602831909 is an apocalyptic number.

It is an amenable number.

11602831909 is a deficient number, since it is larger than the sum of its proper divisors (20831495).

11602831909 is an equidigital number, since it uses as much as digits as its factorization.

11602831909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20831494.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 11602831909 in words is "eleven billion, six hundred two million, eight hundred thirty-one thousand, nine hundred nine".