12446642426 has 4 divisors (see below), whose sum is σ = 18669963642. Its totient is φ = 6223321212.

The previous prime is 12446642399. The next prime is 12446642471. The reversal of 12446642426 is 62424664421.

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., 6732038401 + 5714604025 = 82049^2 + 75595^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3111660605 + ... + 3111660608.

Almost surely, 2^12446642426 is an apocalyptic number.

12446642426 is a deficient number, since it is larger than the sum of its proper divisors (6223321216).

12446642426 is an equidigital number, since it uses as much as digits as its factorization.

12446642426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223321215.

The product of its digits is 442368, while the sum is 41.

The spelling of 12446642426 in words is "twelve billion, four hundred forty-six million, six hundred forty-two thousand, four hundred twenty-six".