12636630674 has 4 divisors (see below), whose sum is σ = 18954946014. Its totient is φ = 6318315336.

The previous prime is 12636630673. The next prime is 12636630703. The reversal of 12636630674 is 47603663621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47603663621 = 5857 ⋅8127653.

It can be written as a sum of positive squares in only one way, i.e., 10756801225 + 1879829449 = 103715^2 + 43357^2 .

It is not an unprimeable number, because it can be changed into a prime (12636630673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159157667 + ... + 3159157670.

Almost surely, 2^12636630674 is an apocalyptic number.

12636630674 is a deficient number, since it is larger than the sum of its proper divisors (6318315340).

12636630674 is an equidigital number, since it uses as much as digits as its factorization.

12636630674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318315339.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 12636630674 in words is "twelve billion, six hundred thirty-six million, six hundred thirty thousand, six hundred seventy-four".