11959585550 has 36 divisors (see below), whose sum is σ = 24450940248. Its totient is φ = 4348938000.

The previous prime is 11959585531. The next prime is 11959585553. The reversal of 11959585550 is 5558595911.

It is a junction number, because it is equal to n+sod(n) for n = 11959585492 and 11959585501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11959585553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 982346 + ... + 994445.

Almost surely, 2^11959585550 is an apocalyptic number.

11959585550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11959585550 is an abundant number, since it is smaller than the sum of its proper divisors (12491354698).

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

11959585550 is a wasteful number, since it uses less digits than its factorization.

11959585550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976825 (or 1976809 counting only the distinct ones).

The product of its (nonzero) digits is 2025000, while the sum is 53.

The spelling of 11959585550 in words is "eleven billion, nine hundred fifty-nine million, five hundred eighty-five thousand, five hundred fifty".