8013945563 has 16 divisors (see below), whose sum is σ = 9016175616. Its totient is φ = 7072578720.

The previous prime is 8013945559. The next prime is 8013945581. The reversal of 8013945563 is 3655493108.

It is a cyclic number.

It is not a de Polignac number, because 8013945563 - 2² = 8013945559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8013945553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86345 + ... + 153242.

It is an arithmetic number, because the mean of its divisors is an integer number (563510976).

Almost surely, 2^8013945563 is an apocalyptic number.

8013945563 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

8013945563 is a deficient number, since it is larger than the sum of its proper divisors (1002230053).

8013945563 is a wasteful number, since it uses less digits than its factorization.

8013945563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239714.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 8013945563 is about 89520.6432226668. The cubic root of 8013945563 is about 2001.1614556298.

The spelling of 8013945563 in words is "eight billion, thirteen million, nine hundred forty-five thousand, five hundred sixty-three".