11501563161 has 24 divisors (see below), whose sum is σ = 16887731392. Its totient is φ = 6957640800.

The previous prime is 11501563147. The next prime is 11501563169. The reversal of 11501563161 is 16136510511.

It is not a de Polignac number, because 11501563161 - 2⁷ = 11501563033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11501563169) 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 23 ways as a sum of consecutive naturals, for example, 167100 + ... + 225666.

Almost surely, 2^11501563161 is an apocalyptic number.

11501563161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11501563161 is a deficient number, since it is larger than the sum of its proper divisors (5386168231).

11501563161 is a wasteful number, since it uses less digits than its factorization.

11501563161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59133 (or 59122 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 30.

The spelling of 11501563161 in words is "eleven billion, five hundred one million, five hundred sixty-three thousand, one hundred sixty-one".