11081878171 has 72 divisors (see below), whose sum is σ = 14713543152. Its totient is φ = 8268220800.

The previous prime is 11081878153. The next prime is 11081878187. The reversal of 11081878171 is 17187818011.

It is not a de Polignac number, because 11081878171 - 2¹⁷ = 11081747099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is the 105271-st Hogben number.

It is not an unprimeable number, because it can be changed into a prime (11081878271) by changing a digit.

It is a nontrivial repunit in base 105270.

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 71 ways as a sum of consecutive naturals, for example, 26322541 + ... + 26322961.

It is an arithmetic number, because the mean of its divisors is an integer number (204354766).

Almost surely, 2^11081878171 is an apocalyptic number.

11081878171 is a deficient number, since it is larger than the sum of its proper divisors (3631664981).

11081878171 is a wasteful number, since it uses less digits than its factorization.

11081878171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 43.

The spelling of 11081878171 in words is "eleven billion, eighty-one million, eight hundred seventy-eight thousand, one hundred seventy-one".