12428749550 has 144 divisors (see below), whose sum is σ = 27817782048. Its totient is φ = 4116268800.

The previous prime is 12428749549. The next prime is 12428749561. The reversal of 12428749550 is 5594782421.

It is a junction number, because it is equal to n+sod(n) for n = 12428749495 and 12428749504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15138140 + ... + 15138960.

It is an arithmetic number, because the mean of its divisors is an integer number (193179042).

Almost surely, 2^12428749550 is an apocalyptic number.

12428749550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12428749550 is an abundant number, since it is smaller than the sum of its proper divisors (15389032498).

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

12428749550 is a wasteful number, since it uses less digits than its factorization.

12428749550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 12428749550 in words is "twelve billion, four hundred twenty-eight million, seven hundred forty-nine thousand, five hundred fifty".