12065553550 has 24 divisors (see below), whose sum is σ = 22673298816. Its totient is φ = 4776464640.

The previous prime is 12065553547. The next prime is 12065553557. The reversal of 12065553550 is 5535556021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065553557) 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 11 ways as a sum of consecutive naturals, for example, 1239022 + ... + 1248721.

It is an arithmetic number, because the mean of its divisors is an integer number (944720784).

Almost surely, 2^12065553550 is an apocalyptic number.

12065553550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12065553550 is a deficient number, since it is larger than the sum of its proper divisors (10607745266).

12065553550 is a wasteful number, since it uses less digits than its factorization.

12065553550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487852 (or 2487847 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 12065553550 in words is "twelve billion, sixty-five million, five hundred fifty-three thousand, five hundred fifty".