1563959142989 has 2 divisors, whose sum is σ = 1563959142990. Its totient is φ = 1563959142988.

The previous prime is 1563959142979. The next prime is 1563959143013. The reversal of 1563959142989 is 9892419593651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1039686122500 + 524273020489 = 1019650^2 + 724067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1563959142989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563959142929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781979571494 + 781979571495.

It is an arithmetic number, because the mean of its divisors is an integer number (781979571495).

Almost surely, 2^{1563959142989} is an apocalyptic number.

It is an amenable number.

1563959142989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563959142989 is an equidigital number, since it uses as much as digits as its factorization.

1563959142989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188956800, while the sum is 71.

The spelling of 1563959142989 in words is "one trillion, five hundred sixty-three billion, nine hundred fifty-nine million, one hundred forty-two thousand, nine hundred eighty-nine".