188388117368 has 128 divisors (see below), whose sum is σ = 411675264000. Its totient is φ = 79921728000.

The previous prime is 188388117367. The next prime is 188388117389. The reversal of 188388117368 is 863711883881.

It is a Cunningham number, because it is equal to 434037²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 188388117368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188388117361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32984033 + ... + 32989743.

It is an arithmetic number, because the mean of its divisors is an integer number (3216213000).

Almost surely, 2^188388117368 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 188388117368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205837632000).

188388117368 is an abundant number, since it is smaller than the sum of its proper divisors (223287146632).

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

188388117368 is a wasteful number, since it uses less digits than its factorization.

188388117368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037 (or 6033 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 62.

The spelling of 188388117368 in words is "one hundred eighty-eight billion, three hundred eighty-eight million, one hundred seventeen thousand, three hundred sixty-eight".