1671783982991 has 2 divisors, whose sum is σ = 1671783982992. Its totient is φ = 1671783982990.

The previous prime is 1671783982871. The next prime is 1671783983021. The reversal of 1671783982991 is 1992893871761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671783982991 - 2²⁶ = 1671716874127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671783982291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835891991495 + 835891991496.

It is an arithmetic number, because the mean of its divisors is an integer number (835891991496).

Almost surely, 2^{1671783982991} is an apocalyptic number.

1671783982991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671783982991 is an equidigital number, since it uses as much as digits as its factorization.

1671783982991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 71.

The spelling of 1671783982991 in words is "one trillion, six hundred seventy-one billion, seven hundred eighty-three million, nine hundred eighty-two thousand, nine hundred ninety-one".