11163881505 has 32 divisors (see below), whose sum is σ = 20429215488. Its totient is φ = 5099673600.

The previous prime is 11163881503. The next prime is 11163881543. The reversal of 11163881505 is 50518836111.

It is not a de Polignac number, because 11163881505 - 2¹ = 11163881503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11163881503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103845 + ... + 181965.

It is an arithmetic number, because the mean of its divisors is an integer number (638412984).

Almost surely, 2^11163881505 is an apocalyptic number.

11163881505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11163881505 is a deficient number, since it is larger than the sum of its proper divisors (9265333983).

11163881505 is a wasteful number, since it uses less digits than its factorization.

11163881505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79497.

The product of its (nonzero) digits is 28800, while the sum is 39.

The spelling of 11163881505 in words is "eleven billion, one hundred sixty-three million, eight hundred eighty-one thousand, five hundred five".