11271945988 has 24 divisors (see below), whose sum is σ = 20068997760. Its totient is φ = 5538030240.

The previous prime is 11271945983. The next prime is 11271946003. The reversal of 11271945988 is 88954917211.

It is a super-3 number, since 3×11271945988³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11271945983) 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, 609445 + ... + 627667.

It is an arithmetic number, because the mean of its divisors is an integer number (836208240).

Almost surely, 2^11271945988 is an apocalyptic number.

It is an amenable number.

11271945988 is a deficient number, since it is larger than the sum of its proper divisors (8797051772).

11271945988 is a wasteful number, since it uses less digits than its factorization.

11271945988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20907 (or 20905 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 55.

The spelling of 11271945988 in words is "eleven billion, two hundred seventy-one million, nine hundred forty-five thousand, nine hundred eighty-eight".