11155161520 has 40 divisors (see below), whose sum is σ = 26772393600. Its totient is φ = 4318126080.

The previous prime is 11155161509. The next prime is 11155161527. The reversal of 11155161520 is 2516155111.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (11155161527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246545 + ... + 2251504.

It is an arithmetic number, because the mean of its divisors is an integer number (669309840).

Almost surely, 2^11155161520 is an apocalyptic number.

11155161520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11155161520 is an abundant number, since it is smaller than the sum of its proper divisors (15617232080).

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

11155161520 is a wasteful number, since it uses less digits than its factorization.

11155161520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498093 (or 4498087 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 28.

The spelling of 11155161520 in words is "eleven billion, one hundred fifty-five million, one hundred sixty-one thousand, five hundred twenty".