12178705636 has 6 divisors (see below), whose sum is σ = 21312734870. Its totient is φ = 6089352816.

The previous prime is 12178705613. The next prime is 12178705661. The reversal of 12178705636 is 63650787121.

12178705636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11748392100 + 430313536 = 108390^2 + 20744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1522338201 + ... + 1522338208.

Almost surely, 2^12178705636 is an apocalyptic number.

It is an amenable number.

12178705636 is a deficient number, since it is larger than the sum of its proper divisors (9134029234).

12178705636 is a wasteful number, since it uses less digits than its factorization.

12178705636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044676413 (or 3044676411 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 12178705636 in words is "twelve billion, one hundred seventy-eight million, seven hundred five thousand, six hundred thirty-six".