12550746509 has 4 divisors (see below), whose sum is σ = 14343710304. Its totient is φ = 10757782716.

The previous prime is 12550746493. The next prime is 12550746539. The reversal of 12550746509 is 90564705521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90564705521 = 43717 ⋅2071613.

It is a cyclic number.

It is not a de Polignac number, because 12550746509 - 2⁴ = 12550746493 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12550746509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550746539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896481887 + ... + 896481900.

It is an arithmetic number, because the mean of its divisors is an integer number (3585927576).

Almost surely, 2^12550746509 is an apocalyptic number.

It is an amenable number.

12550746509 is a deficient number, since it is larger than the sum of its proper divisors (1792963795).

12550746509 is an equidigital number, since it uses as much as digits as its factorization.

12550746509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792963794.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 12550746509 in words is "twelve billion, five hundred fifty million, seven hundred forty-six thousand, five hundred nine".