12645072784 has 10 divisors (see below), whose sum is σ = 24499828550. Its totient is φ = 6322536384.

The previous prime is 12645072767. The next prime is 12645072809. The reversal of 12645072784 is 48727054621.

It can be written as a sum of positive squares in only one way, i.e., 12640055184 + 5017600 = 112428^2 + 2240^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 395158509 + ... + 395158540.

It is an arithmetic number, because the mean of its divisors is an integer number (2449982855).

Almost surely, 2^12645072784 is an apocalyptic number.

It is an amenable number.

12645072784 is a deficient number, since it is larger than the sum of its proper divisors (11854755766).

12645072784 is an equidigital number, since it uses as much as digits as its factorization.

12645072784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790317057 (or 790317051 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 12645072784 in words is "twelve billion, six hundred forty-five million, seventy-two thousand, seven hundred eighty-four".