11155005520 has 40 divisors (see below), whose sum is σ = 27063017856. Its totient is φ = 4268001408.

The previous prime is 11155005517. The next prime is 11155005539. The reversal of 11155005520 is 2550055111.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3029412 + ... + 3033091.

Almost surely, 2^11155005520 is an apocalyptic number.

11155005520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11155005520 is an abundant number, since it is smaller than the sum of its proper divisors (15908012336).

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

11155005520 is a wasteful number, since it uses less digits than its factorization.

11155005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6062539 (or 6062533 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

The spelling of 11155005520 in words is "eleven billion, one hundred fifty-five million, five thousand, five hundred twenty".