11550256520 has 128 divisors (see below), whose sum is σ = 29336186880. Its totient is φ = 4054752000.

The previous prime is 11550256519. The next prime is 11550256591. The reversal of 11550256520 is 2565205511.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7787699 + ... + 7789181.

It is an arithmetic number, because the mean of its divisors is an integer number (229188960).

Almost surely, 2^11550256520 is an apocalyptic number.

11550256520 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 11550256520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14668093440).

11550256520 is an abundant number, since it is smaller than the sum of its proper divisors (17785930360).

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

11550256520 is a wasteful number, since it uses less digits than its factorization.

11550256520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 11550256520 in words is "eleven billion, five hundred fifty million, two hundred fifty-six thousand, five hundred twenty".