11989881442 has 48 divisors (see below), whose sum is σ = 22844620512. Its totient is φ = 4666966080.

The previous prime is 11989881437. The next prime is 11989881443. The reversal of 11989881442 is 24418898911.

It is not an unprimeable number, because it can be changed into a prime (11989881443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1281393 + ... + 1290715.

It is an arithmetic number, because the mean of its divisors is an integer number (475929594).

Almost surely, 2^11989881442 is an apocalyptic number.

11989881442 is a deficient number, since it is larger than the sum of its proper divisors (10854739070).

11989881442 is a wasteful number, since it uses less digits than its factorization.

11989881442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543 (or 10536 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 55.

The spelling of 11989881442 in words is "eleven billion, nine hundred eighty-nine million, eight hundred eighty-one thousand, four hundred forty-two".