12578906056 has 8 divisors (see below), whose sum is σ = 23585448870. Its totient is φ = 6289453024.

The previous prime is 12578906051. The next prime is 12578906059. The reversal of 12578906056 is 65060987521.

It can be written as a sum of positive squares in only one way, i.e., 10885583556 + 1693322500 = 104334^2 + 41150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12578906051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786181621 + ... + 786181636.

Almost surely, 2^12578906056 is an apocalyptic number.

It is an amenable number.

12578906056 is a deficient number, since it is larger than the sum of its proper divisors (11006542814).

12578906056 is a wasteful number, since it uses less digits than its factorization.

12578906056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572363263 (or 1572363259 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 12578906056 in words is "twelve billion, five hundred seventy-eight million, nine hundred six thousand, fifty-six".