12645180827 has 4 divisors (see below), whose sum is σ = 13310716680. Its totient is φ = 11979644976.

The previous prime is 12645180803. The next prime is 12645180857. The reversal of 12645180827 is 72808154621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72808154621 = 59 ⋅1234036519.

It is a cyclic number.

It is not a de Polignac number, because 12645180827 - 2¹⁴ = 12645164443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645180857) 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, 332767898 + ... + 332767935.

It is an arithmetic number, because the mean of its divisors is an integer number (3327679170).

Almost surely, 2^12645180827 is an apocalyptic number.

12645180827 is a deficient number, since it is larger than the sum of its proper divisors (665535853).

12645180827 is an equidigital number, since it uses as much as digits as its factorization.

12645180827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665535852.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 12645180827 in words is "twelve billion, six hundred forty-five million, one hundred eighty thousand, eight hundred twenty-seven".