11381861938842 has 24 divisors (see below), whose sum is σ = 25234205540544. Its totient is φ = 3705722491464.

The previous prime is 11381861938813. The next prime is 11381861938981. The reversal of 11381861938842 is 24883916818311.

11381861938842 is a `hidden beast` number, since 1 + 1 + 3 + 8 + 1 + 8 + 619 + 3 + 8 + 8 + 4 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 11381861938842.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7352623218 + ... + 7352624765.

It is an arithmetic number, because the mean of its divisors is an integer number (1051425230856).

Almost surely, 2^{11381861938842} is an apocalyptic number.

11381861938842 is an abundant number, since it is smaller than the sum of its proper divisors (13852343601702).

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

11381861938842 is a wasteful number, since it uses less digits than its factorization.

11381861938842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14705248034 (or 14705248031 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 63.

The spelling of 11381861938842 in words is "eleven trillion, three hundred eighty-one billion, eight hundred sixty-one million, nine hundred thirty-eight thousand, eight hundred forty-two".