12720542845 has 8 divisors (see below), whose sum is σ = 16068054240. Its totient is φ = 9640832400.

The previous prime is 12720542827. The next prime is 12720542873. The reversal of 12720542845 is 54824502721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12720542845 - 2⁷ = 12720542717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12720542798 and 12720542807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66950131 + ... + 66950320.

It is an arithmetic number, because the mean of its divisors is an integer number (2008506780).

Almost surely, 2^12720542845 is an apocalyptic number.

It is an amenable number.

12720542845 is a deficient number, since it is larger than the sum of its proper divisors (3347511395).

12720542845 is a wasteful number, since it uses less digits than its factorization.

12720542845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133900475.

The product of its (nonzero) digits is 179200, while the sum is 40.

The spelling of 12720542845 in words is "twelve billion, seven hundred twenty million, five hundred forty-two thousand, eight hundred forty-five".