11657688238 has 16 divisors (see below), whose sum is σ = 20034957024. Its totient is φ = 4983564960.

The previous prime is 11657688191. The next prime is 11657688257. The reversal of 11657688238 is 83288675611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043173 + ... + 1054288.

It is an arithmetic number, because the mean of its divisors is an integer number (1252184814).

Almost surely, 2^11657688238 is an apocalyptic number.

11657688238 is a deficient number, since it is larger than the sum of its proper divisors (8377268786).

11657688238 is a wasteful number, since it uses less digits than its factorization.

11657688238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097867.

The product of its digits is 3870720, while the sum is 55.

The spelling of 11657688238 in words is "eleven billion, six hundred fifty-seven million, six hundred eighty-eight thousand, two hundred thirty-eight".