1563545801663 has 8 divisors (see below), whose sum is σ = 1568490868560. Its totient is φ = 1558607460480.

The previous prime is 1563545801639. The next prime is 1563545801669. The reversal of 1563545801663 is 3661085453651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1563545801663 - 2¹⁶ = 1563545736127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563545801669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215545 + ... + 2145842.

It is an arithmetic number, because the mean of its divisors is an integer number (196061358570).

Almost surely, 2^{1563545801663} is an apocalyptic number.

1563545801663 is a deficient number, since it is larger than the sum of its proper divisors (4945066897).

1563545801663 is a wasteful number, since it uses less digits than its factorization.

1563545801663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362857.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 1563545801663 in words is "one trillion, five hundred sixty-three billion, five hundred forty-five million, eight hundred one thousand, six hundred sixty-three".