11939409550 has 12 divisors (see below), whose sum is σ = 22207301856. Its totient is φ = 4775763800.

The previous prime is 11939409539. The next prime is 11939409557. The reversal of 11939409550 is 5590493911.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11939409550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11939409557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119394046 + ... + 119394145.

It is an arithmetic number, because the mean of its divisors is an integer number (1850608488).

Almost surely, 2^11939409550 is an apocalyptic number.

11939409550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11939409550 is a deficient number, since it is larger than the sum of its proper divisors (10267892306).

11939409550 is a wasteful number, since it uses less digits than its factorization.

11939409550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238788203 (or 238788198 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 46.

The spelling of 11939409550 in words is "eleven billion, nine hundred thirty-nine million, four hundred nine thousand, five hundred fifty".