12000451550 has 24 divisors (see below), whose sum is σ = 22603389600. Its totient is φ = 4739417280.

The previous prime is 12000451543. The next prime is 12000451577. The reversal of 12000451550 is 5515400021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 1515095 + ... + 1522994.

It is an arithmetic number, because the mean of its divisors is an integer number (941807900).

Almost surely, 2^12000451550 is an apocalyptic number.

12000451550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12000451550 is a deficient number, since it is larger than the sum of its proper divisors (10602938050).

12000451550 is a wasteful number, since it uses less digits than its factorization.

12000451550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038180 (or 3038175 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 12000451550 its reverse (5515400021), we get a palindrome (17515851571).

The spelling of 12000451550 in words is "twelve billion, four hundred fifty-one thousand, five hundred fifty".