11638618068 has 96 divisors (see below), whose sum is σ = 33900410880. Its totient is φ = 3019213440.

The previous prime is 11638618031. The next prime is 11638618073. The reversal of 11638618068 is 86081683611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 767730 + ... + 782742.

It is an arithmetic number, because the mean of its divisors is an integer number (353129280).

Almost surely, 2^11638618068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11638618068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16950205440).

11638618068 is an abundant number, since it is smaller than the sum of its proper divisors (22261792812).

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

11638618068 is a wasteful number, since it uses less digits than its factorization.

11638618068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15877 (or 15875 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 11638618068 in words is "eleven billion, six hundred thirty-eight million, six hundred eighteen thousand, sixty-eight".