1678748896651 has 2 divisors, whose sum is σ = 1678748896652. Its totient is φ = 1678748896650.

The previous prime is 1678748896639. The next prime is 1678748896661. The reversal of 1678748896651 is 1566988478761.

It is a strong prime.

It is an emirp because it is prime and its reverse (1566988478761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1678748896651 - 2²⁹ = 1678212025739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1678748896661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839374448325 + 839374448326.

It is an arithmetic number, because the mean of its divisors is an integer number (839374448326).

Almost surely, 2^{1678748896651} is an apocalyptic number.

1678748896651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678748896651 is an equidigital number, since it uses as much as digits as its factorization.

1678748896651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 975421440, while the sum is 76.

The spelling of 1678748896651 in words is "one trillion, six hundred seventy-eight billion, seven hundred forty-eight million, eight hundred ninety-six thousand, six hundred fifty-one".