11209617988 has 24 divisors (see below), whose sum is σ = 19860292760. Its totient is φ = 5535578880.

The previous prime is 11209617983. The next prime is 11209618001. The reversal of 11209617988 is 88971690211.

It can be written as a sum of positive squares in 4 ways, for example, as 124055044 + 11085562944 = 11138^2 + 105288^2 .

It is not an unprimeable number, because it can be changed into a prime (11209617983) 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 7 ways as a sum of consecutive naturals, for example, 95398 + ... + 177538.

Almost surely, 2^11209617988 is an apocalyptic number.

It is an amenable number.

11209617988 is a deficient number, since it is larger than the sum of its proper divisors (8650674772).

11209617988 is a wasteful number, since it uses less digits than its factorization.

11209617988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82567 (or 82565 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 52.

The spelling of 11209617988 in words is "eleven billion, two hundred nine million, six hundred seventeen thousand, nine hundred eighty-eight".