2011171880 has 32 divisors (see below), whose sum is σ = 4526755200. Its totient is φ = 804181056.

The previous prime is 2011171871. The next prime is 2011171909. The reversal of 2011171880 is 881711102.

It is an unprimeable number.

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, 131261 + ... + 145779.

It is an arithmetic number, because the mean of its divisors is an integer number (141461100).

Almost surely, 2^2011171880 is an apocalyptic number.

2011171880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011171880 is an abundant number, since it is smaller than the sum of its proper divisors (2515583320).

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

2011171880 is a wasteful number, since it uses less digits than its factorization.

2011171880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17993 (or 17989 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 2011171880 is about 44846.0910225183. The cubic root of 2011171880 is about 1262.2626430888.

Adding to 2011171880 its reverse (881711102), we get a palindrome (2892882982).

The spelling of 2011171880 in words is "two billion, eleven million, one hundred seventy-one thousand, eight hundred eighty".