11391650138 has 32 divisors (see below), whose sum is σ = 19305648000. Its totient is φ = 4993773120.

The previous prime is 11391650131. The next prime is 11391650189. The reversal of 11391650138 is 83105619311.

It is not an unprimeable number, because it can be changed into a prime (11391650131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576608 + ... + 596036.

It is an arithmetic number, because the mean of its divisors is an integer number (603301500).

Almost surely, 2^11391650138 is an apocalyptic number.

11391650138 is a deficient number, since it is larger than the sum of its proper divisors (7913997862).

11391650138 is a wasteful number, since it uses less digits than its factorization.

11391650138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20390.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 11391650138 in words is "eleven billion, three hundred ninety-one million, six hundred fifty thousand, one hundred thirty-eight".