11161013520 has 80 divisors (see below), whose sum is σ = 34635283200. Its totient is φ = 2973161472.

The previous prime is 11161013509. The next prime is 11161013537. The reversal of 11161013520 is 2531016111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210681 + ... + 258279.

It is an arithmetic number, because the mean of its divisors is an integer number (432941040).

Almost surely, 2^11161013520 is an apocalyptic number.

11161013520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11161013520 is an abundant number, since it is smaller than the sum of its proper divisors (23474269680).

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

11161013520 is a wasteful number, since it uses less digits than its factorization.

11161013520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48592 (or 48586 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 11161013520 its reverse (2531016111), we get a palindrome (13692029631).

The spelling of 11161013520 in words is "eleven billion, one hundred sixty-one million, thirteen thousand, five hundred twenty".