11918851550 has 12 divisors (see below), whose sum is σ = 22169063976. Its totient is φ = 4767540600.

The previous prime is 11918851537. The next prime is 11918851561. The reversal of 11918851550 is 5515881911.

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 5 ways as a sum of consecutive naturals, for example, 119188466 + ... + 119188565.

It is an arithmetic number, because the mean of its divisors is an integer number (1847421998).

Almost surely, 2^11918851550 is an apocalyptic number.

11918851550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11918851550 is a deficient number, since it is larger than the sum of its proper divisors (10250212426).

11918851550 is a wasteful number, since it uses less digits than its factorization.

11918851550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238377043 (or 238377038 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 44.

The spelling of 11918851550 in words is "eleven billion, nine hundred eighteen million, eight hundred fifty-one thousand, five hundred fifty".