11838745636 has 9 divisors (see below), whose sum is σ = 20718185691. Its totient is φ = 5919264012.

The previous prime is 11838745631. The next prime is 11838745673. The reversal of 11838745636 is 63654783811.

It is a happy number.

The square root of 11838745636 is 108806.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11838745631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 190411 + ... + 244813.

Almost surely, 2^11838745636 is an apocalyptic number.

11838745636 is the 108806-th square number.

It is an amenable number.

11838745636 is a deficient number, since it is larger than the sum of its proper divisors (8879440055).

11838745636 is an frugal number, since it uses more digits than its factorization.

11838745636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108810 (or 54405 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The spelling of 11838745636 in words is "eleven billion, eight hundred thirty-eight million, seven hundred forty-five thousand, six hundred thirty-six".