12636971146 has 4 divisors (see below), whose sum is σ = 18955456722. Its totient is φ = 6318485572.

The previous prime is 12636971129. The next prime is 12636971147. The reversal of 12636971146 is 64117963621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12531683025 + 105288121 = 111945^2 + 10261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12636971096 and 12636971105.

It is not an unprimeable number, because it can be changed into a prime (12636971147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159242785 + ... + 3159242788.

Almost surely, 2^12636971146 is an apocalyptic number.

12636971146 is a deficient number, since it is larger than the sum of its proper divisors (6318485576).

12636971146 is an equidigital number, since it uses as much as digits as its factorization.

12636971146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318485575.

The product of its digits is 326592, while the sum is 46.

The spelling of 12636971146 in words is "twelve billion, six hundred thirty-six million, nine hundred seventy-one thousand, one hundred forty-six".