11113532550 has 144 divisors (see below), whose sum is σ = 30890820480. Its totient is φ = 2864548800.

The previous prime is 11113532527. The next prime is 11113532603. The reversal of 11113532550 is 5523531111.

11113532550 is a `hidden beast` number, since 11 + 113 + 532 + 5 + 5 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13405536 + ... + 13406364.

Almost surely, 2^11113532550 is an apocalyptic number.

11113532550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11113532550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15445410240).

11113532550 is an abundant number, since it is smaller than the sum of its proper divisors (19777287930).

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

11113532550 is an equidigital number, since it uses as much as digits as its factorization.

11113532550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The spelling of 11113532550 in words is "eleven billion, one hundred thirteen million, five hundred thirty-two thousand, five hundred fifty".