12545720459 has 4 divisors (see below), whose sum is σ = 12548450616. Its totient is φ = 12542990304.

The previous prime is 12545720449. The next prime is 12545720521. The reversal of 12545720459 is 95402754521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95402754521 = 157733 ⋅604837.

It is a cyclic number.

It is not a de Polignac number, because 12545720459 - 2⁴ = 12545720443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545720449) 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, 1358174 + ... + 1367379.

It is an arithmetic number, because the mean of its divisors is an integer number (3137112654).

Almost surely, 2^12545720459 is an apocalyptic number.

12545720459 is a deficient number, since it is larger than the sum of its proper divisors (2730157).

12545720459 is an equidigital number, since it uses as much as digits as its factorization.

12545720459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730156.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 12545720459 in words is "twelve billion, five hundred forty-five million, seven hundred twenty thousand, four hundred fifty-nine".