12566052550 has 48 divisors (see below), whose sum is σ = 23512401360. Its totient is φ = 4996506240.

The previous prime is 12566052547. The next prime is 12566052557. The reversal of 12566052550 is 5525066521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566052557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8647624 + ... + 8649076.

It is an arithmetic number, because the mean of its divisors is an integer number (489841695).

Almost surely, 2^12566052550 is an apocalyptic number.

12566052550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12566052550 is a deficient number, since it is larger than the sum of its proper divisors (10946348810).

12566052550 is a wasteful number, since it uses less digits than its factorization.

12566052550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377 (or 2372 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 12566052550 in words is "twelve billion, five hundred sixty-six million, fifty-two thousand, five hundred fifty".