12644654042 has 8 divisors (see below), whose sum is σ = 18998967636. Its totient is φ = 6311664832.

The previous prime is 12644654039. The next prime is 12644654051. The reversal of 12644654042 is 24045644621.

It can be written as a sum of positive squares in 2 ways, for example, as 11809386241 + 835267801 = 108671^2 + 28901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12644653987 and 12644654005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5329613 + ... + 5331984.

Almost surely, 2^12644654042 is an apocalyptic number.

12644654042 is a deficient number, since it is larger than the sum of its proper divisors (6354313594).

12644654042 is a wasteful number, since it uses less digits than its factorization.

12644654042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10662192.

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 12644654042 in words is "twelve billion, six hundred forty-four million, six hundred fifty-four thousand, forty-two".