12968218546 has 4 divisors (see below), whose sum is σ = 19452327822. Its totient is φ = 6484109272.

The previous prime is 12968218537. The next prime is 12968218553. The reversal of 12968218546 is 64581286921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64581286921 = 11279 ⋅5725799.

It can be written as a sum of positive squares in only one way, i.e., 12273316225 + 694902321 = 110785^2 + 26361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12968218493 and 12968218502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3242054635 + ... + 3242054638.

Almost surely, 2^12968218546 is an apocalyptic number.

12968218546 is a deficient number, since it is larger than the sum of its proper divisors (6484109276).

12968218546 is an equidigital number, since it uses as much as digits as its factorization.

12968218546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484109275.

The product of its digits is 1658880, while the sum is 52.

The spelling of 12968218546 in words is "twelve billion, nine hundred sixty-eight million, two hundred eighteen thousand, five hundred forty-six".