12049520617 has 4 divisors (see below), whose sum is σ = 12253749840. Its totient is φ = 11845291396.

The previous prime is 12049520591. The next prime is 12049520647. The reversal of 12049520617 is 71602594021.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12049520617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12049520647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 102114523 + ... + 102114640.

It is an arithmetic number, because the mean of its divisors is an integer number (3063437460).

Almost surely, 2^12049520617 is an apocalyptic number.

It is an amenable number.

12049520617 is a deficient number, since it is larger than the sum of its proper divisors (204229223).

12049520617 is an equidigital number, since it uses as much as digits as its factorization.

12049520617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204229222.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 12049520617 in words is "twelve billion, forty-nine million, five hundred twenty thousand, six hundred seventeen".