1982816663 has 2 divisors, whose sum is σ = 1982816664. Its totient is φ = 1982816662.

The previous prime is 1982816639. The next prime is 1982816707. The reversal of 1982816663 is 3666182891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1982816663 - 2¹⁴ = 1982800279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982816603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991408331 + 991408332.

It is an arithmetic number, because the mean of its divisors is an integer number (991408332).

Almost surely, 2^1982816663 is an apocalyptic number.

1982816663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982816663 is an equidigital number, since it uses as much as digits as its factorization.

1982816663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 1982816663 is about 44528.8295714136. The cubic root of 1982816663 is about 1256.3023919207.

The spelling of 1982816663 in words is "one billion, nine hundred eighty-two million, eight hundred sixteen thousand, six hundred sixty-three".