11155125520 has 120 divisors (see below), whose sum is σ = 32580539712. Its totient is φ = 3476901120.

The previous prime is 11155125491. The next prime is 11155125563. The reversal of 11155125520 is 2552155111.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14554 + ... + 150073.

Almost surely, 2^11155125520 is an apocalyptic number.

11155125520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11155125520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16290269856).

11155125520 is an abundant number, since it is smaller than the sum of its proper divisors (21425414192).

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

11155125520 is a wasteful number, since it uses less digits than its factorization.

11155125520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164669 (or 164652 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 11155125520 in words is "eleven billion, one hundred fifty-five million, one hundred twenty-five thousand, five hundred twenty".