11888998550 has 96 divisors (see below), whose sum is σ = 26420808960. Its totient is φ = 3922934400.

The previous prime is 11888998519. The next prime is 11888998553. The reversal of 11888998550 is 5589988811.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11888998553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 407759 + ... + 435941.

It is an arithmetic number, because the mean of its divisors is an integer number (275216760).

Almost surely, 2^11888998550 is an apocalyptic number.

11888998550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11888998550 is an abundant number, since it is smaller than the sum of its proper divisors (14531810410).

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

11888998550 is a wasteful number, since it uses less digits than its factorization.

11888998550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28278 (or 28273 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 62.

The spelling of 11888998550 in words is "eleven billion, eight hundred eighty-eight million, nine hundred ninety-eight thousand, five hundred fifty".