11149319988 has 18 divisors (see below), whose sum is σ = 28183003394. Its totient is φ = 3716439984.

The previous prime is 11149319983. The next prime is 11149320043. The reversal of 11149319988 is 88991394111.

It can be written as a sum of positive squares in only one way, i.e., 8634498084 + 2514821904 = 92922^2 + 50148^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11149319983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154851631 + ... + 154851702.

Almost surely, 2^11149319988 is an apocalyptic number.

11149319988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11149319988 is an abundant number, since it is smaller than the sum of its proper divisors (17033683406).

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

11149319988 is a wasteful number, since it uses less digits than its factorization.

11149319988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309703343 (or 309703338 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The spelling of 11149319988 in words is "eleven billion, one hundred forty-nine million, three hundred nineteen thousand, nine hundred eighty-eight".