1677981268673 has 2 divisors, whose sum is σ = 1677981268674. Its totient is φ = 1677981268672.

The previous prime is 1677981268669. The next prime is 1677981268703. The reversal of 1677981268673 is 3768621897761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118323170064 + 559658098609 = 1057508^2 + 748103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1677981268673 - 2² = 1677981268669 is a prime.

It is a super-2 number, since 2×1677981268673² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1677981268597 and 1677981268606.

It is not a weakly prime, because it can be changed into another prime (1677981268603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838990634336 + 838990634337.

It is an arithmetic number, because the mean of its divisors is an integer number (838990634337).

Almost surely, 2^{1677981268673} is an apocalyptic number.

It is an amenable number.

1677981268673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1677981268673 is an equidigital number, since it uses as much as digits as its factorization.

1677981268673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256048128, while the sum is 71.

The spelling of 1677981268673 in words is "one trillion, six hundred seventy-seven billion, nine hundred eighty-one million, two hundred sixty-eight thousand, six hundred seventy-three".