11388485381 has 24 divisors (see below), whose sum is σ = 14408231544. Its totient is φ = 8921404800.

The previous prime is 11388485359. The next prime is 11388485483. The reversal of 11388485381 is 18358488311.

It can be written as a sum of positive squares in 4 ways, for example, as 112169281 + 11276316100 = 10591^2 + 106190^2 .

It is not a de Polignac number, because 11388485381 - 2¹⁰ = 11388484357 is a prime.

It is a super-2 number, since 2×11388485381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11388485321) 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 23 ways as a sum of consecutive naturals, for example, 24170 + ... + 152843.

It is an arithmetic number, because the mean of its divisors is an integer number (600342981).

Almost surely, 2^11388485381 is an apocalyptic number.

It is an amenable number.

11388485381 is a deficient number, since it is larger than the sum of its proper divisors (3019746163).

11388485381 is a wasteful number, since it uses less digits than its factorization.

11388485381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177141 (or 177134 counting only the distinct ones).

The product of its digits is 737280, while the sum is 50.

The spelling of 11388485381 in words is "eleven billion, three hundred eighty-eight million, four hundred eighty-five thousand, three hundred eighty-one".