11381278252 has 48 divisors (see below), whose sum is σ = 21474125568. Its totient is φ = 5258373120.

The previous prime is 11381278231. The next prime is 11381278253. The reversal of 11381278252 is 25287218311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11381278253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2557093 + ... + 2561539.

It is an arithmetic number, because the mean of its divisors is an integer number (447377616).

Almost surely, 2^11381278252 is an apocalyptic number.

It is an amenable number.

11381278252 is a deficient number, since it is larger than the sum of its proper divisors (10092847316).

11381278252 is a wasteful number, since it uses less digits than its factorization.

11381278252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146 (or 5144 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The spelling of 11381278252 in words is "eleven billion, three hundred eighty-one million, two hundred seventy-eight thousand, two hundred fifty-two".