11717068638 has 48 divisors (see below), whose sum is σ = 25797533328. Its totient is φ = 3545203200.

The previous prime is 11717068609. The next prime is 11717068639. The reversal of 11717068638 is 83686071711.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717068639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476608 + ... + 500588.

It is an arithmetic number, because the mean of its divisors is an integer number (537448611).

Almost surely, 2^11717068638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11717068638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12898766664).

11717068638 is an abundant number, since it is smaller than the sum of its proper divisors (14080464690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11717068638 is a wasteful number, since it uses less digits than its factorization.

11717068638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24681 (or 24670 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 11717068638 in words is "eleven billion, seven hundred seventeen million, sixty-eight thousand, six hundred thirty-eight".