12131642550 has 24 divisors (see below), whose sum is σ = 30086473896. Its totient is φ = 3235104640.

The previous prime is 12131642539. The next prime is 12131642609. The reversal of 12131642550 is 5524613121.

12131642550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40438659 + ... + 40438958.

It is an arithmetic number, because the mean of its divisors is an integer number (1253603079).

Almost surely, 2^12131642550 is an apocalyptic number.

12131642550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131642550 is an abundant number, since it is smaller than the sum of its proper divisors (17954831346).

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

12131642550 is a wasteful number, since it uses less digits than its factorization.

12131642550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80877632 (or 80877627 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 12131642550 in words is "twelve billion, one hundred thirty-one million, six hundred forty-two thousand, five hundred fifty".