12844350905978 has 4 divisors (see below), whose sum is σ = 19266526358970. Its totient is φ = 6422175452988.

The previous prime is 12844350905959. The next prime is 12844350906007. The reversal of 12844350905978 is 87950905344821.

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., 8741323904329 + 4103027001649 = 2956573^2 + 2025593^2 .

It is a super-2 number, since 2×12844350905978² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211087726493 + ... + 3211087726496.

Almost surely, 2^{12844350905978} is an apocalyptic number.

12844350905978 is a deficient number, since it is larger than the sum of its proper divisors (6422175452992).

12844350905978 is an equidigital number, since it uses as much as digits as its factorization.

12844350905978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422175452991.

The product of its (nonzero) digits is 87091200, while the sum is 65.

The spelling of 12844350905978 in words is "twelve trillion, eight hundred forty-four billion, three hundred fifty million, nine hundred five thousand, nine hundred seventy-eight".