1663454563 has 2 divisors, whose sum is σ = 1663454564. Its totient is φ = 1663454562.

The previous prime is 1663454497. The next prime is 1663454591. The reversal of 1663454563 is 3654543661.

It is a strong prime.

It is an emirp because it is prime and its reverse (3654543661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663454563 - 2¹⁷ = 1663323491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663454593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831727281 + 831727282.

It is an arithmetic number, because the mean of its divisors is an integer number (831727282).

Almost surely, 2^1663454563 is an apocalyptic number.

1663454563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663454563 is an equidigital number, since it uses as much as digits as its factorization.

1663454563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 43.

The square root of 1663454563 is about 40785.4699985179. The cubic root of 1663454563 is about 1184.8689376552.

The spelling of 1663454563 in words is "one billion, six hundred sixty-three million, four hundred fifty-four thousand, five hundred sixty-three".