11388555750 has 128 divisors (see below), whose sum is σ = 33395701248. Its totient is φ = 2548464000.

The previous prime is 11388555679. The next prime is 11388555769. The reversal of 11388555750 is 5755588311.

It is a self number, because there is not a number n which added to its sum of digits gives 11388555750.

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 63 ways as a sum of consecutive naturals, for example, 54157 + ... + 160343.

It is an arithmetic number, because the mean of its divisors is an integer number (260903916).

Almost surely, 2^11388555750 is an apocalyptic number.

11388555750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11388555750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16697850624).

11388555750 is an abundant number, since it is smaller than the sum of its proper divisors (22007145498).

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

11388555750 is a wasteful number, since it uses less digits than its factorization.

11388555750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106231 (or 106221 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 48.

The spelling of 11388555750 in words is "eleven billion, three hundred eighty-eight million, five hundred fifty-five thousand, seven hundred fifty".