12446781458 has 8 divisors (see below), whose sum is σ = 18671357628. Its totient is φ = 6222995584.

The previous prime is 12446781437. The next prime is 12446781461. The reversal of 12446781458 is 85418764421.

It can be written as a sum of positive squares in 2 ways, for example, as 10959367969 + 1487413489 = 104687^2 + 38567^2 .

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

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, 156491 + ... + 222222.

Almost surely, 2^12446781458 is an apocalyptic number.

12446781458 is a deficient number, since it is larger than the sum of its proper divisors (6224576170).

12446781458 is a wasteful number, since it uses less digits than its factorization.

12446781458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395148.

The product of its digits is 1720320, while the sum is 50.

The spelling of 12446781458 in words is "twelve billion, four hundred forty-six million, seven hundred eighty-one thousand, four hundred fifty-eight".