1678281966249 has 16 divisors (see below), whose sum is σ = 2557415503872. Its totient is φ = 959005718928.

The previous prime is 1678281966247. The next prime is 1678281966307. The reversal of 1678281966249 is 9426691828761.

It is not a de Polignac number, because 1678281966249 - 2¹ = 1678281966247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1678281966247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1262182 + ... + 2224784.

It is an arithmetic number, because the mean of its divisors is an integer number (159838468992).

Almost surely, 2^{1678281966249} is an apocalyptic number.

It is an amenable number.

1678281966249 is a deficient number, since it is larger than the sum of its proper divisors (879133537623).

1678281966249 is an equidigital number, since it uses as much as digits as its factorization.

1678281966249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045636.

The product of its digits is 125411328, while the sum is 69.

The spelling of 1678281966249 in words is "one trillion, six hundred seventy-eight billion, two hundred eighty-one million, nine hundred sixty-six thousand, two hundred forty-nine".