11138949912 has 32 divisors (see below), whose sum is σ = 28059958080. Its totient is φ = 3684638880.

The previous prime is 11138949911. The next prime is 11138949919. The reversal of 11138949912 is 21994983111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11138949911) 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 7 ways as a sum of consecutive naturals, for example, 1768318 + ... + 1774605.

It is an arithmetic number, because the mean of its divisors is an integer number (876873690).

Almost surely, 2^11138949912 is an apocalyptic number.

11138949912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11138949912 is an abundant number, since it is smaller than the sum of its proper divisors (16921008168).

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

11138949912 is a wasteful number, since it uses less digits than its factorization.

11138949912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543063 (or 3543059 counting only the distinct ones).

The product of its digits is 139968, while the sum is 48.

The spelling of 11138949912 in words is "eleven billion, one hundred thirty-eight million, nine hundred forty-nine thousand, nine hundred twelve".