12545417873 has 4 divisors (see below), whose sum is σ = 13090870848. Its totient is φ = 11999964900.

The previous prime is 12545417867. The next prime is 12545417887. The reversal of 12545417873 is 37871454521.

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-12545417873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12545410873) 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, 272726453 + ... + 272726498.

It is an arithmetic number, because the mean of its divisors is an integer number (3272717712).

Almost surely, 2^12545417873 is an apocalyptic number.

It is an amenable number.

12545417873 is a deficient number, since it is larger than the sum of its proper divisors (545452975).

12545417873 is an equidigital number, since it uses as much as digits as its factorization.

12545417873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545452974.

The product of its digits is 940800, while the sum is 47.

The spelling of 12545417873 in words is "twelve billion, five hundred forty-five million, four hundred seventeen thousand, eight hundred seventy-three".