11388555749 has 16 divisors (see below), whose sum is σ = 12232874880. Its totient is φ = 10570694400.

The previous prime is 11388555679. The next prime is 11388555769. The reversal of 11388555749 is 94755588311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11388555749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11388555694 and 11388555703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11388555769) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 182249 + ... + 236625.

It is an arithmetic number, because the mean of its divisors is an integer number (764554680).

Almost surely, 2^11388555749 is an apocalyptic number.

11388555749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11388555749 is a deficient number, since it is larger than the sum of its proper divisors (844319131).

11388555749 is a wasteful number, since it uses less digits than its factorization.

11388555749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54620.

The product of its digits is 6048000, while the sum is 56.

The spelling of 11388555749 in words is "eleven billion, three hundred eighty-eight million, five hundred fifty-five thousand, seven hundred forty-nine".