11400181871238 has 64 divisors (see below), whose sum is σ = 26152070461440. Its totient is φ = 3677321138400.

The previous prime is 11400181871231. The next prime is 11400181871291. The reversal of 11400181871238 is 83217818100411.

11400181871238 is a `hidden beast` number, since 1 + 1 + 400 + 1 + 8 + 1 + 8 + 7 + 1 + 238 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11400181871193 and 11400181871202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11400181871231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42917853 + ... + 43182663.

It is an arithmetic number, because the mean of its divisors is an integer number (408626100960).

Almost surely, 2^{11400181871238} is an apocalyptic number.

11400181871238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11400181871238 is an abundant number, since it is smaller than the sum of its proper divisors (14751888590202).

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

11400181871238 is a wasteful number, since it uses less digits than its factorization.

11400181871238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290570 (or 290564 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 45.

Adding to 11400181871238 its reverse (83217818100411), we get a palindrome (94617999971649).

The spelling of 11400181871238 in words is "eleven trillion, four hundred billion, one hundred eighty-one million, eight hundred seventy-one thousand, two hundred thirty-eight".