13561683563 has 8 divisors (see below), whose sum is σ = 13726987200. Its totient is φ = 13396667328.

The previous prime is 13561683533. The next prime is 13561683571. The reversal of 13561683563 is 36538616531.

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

It is not a de Polignac number, because 13561683563 - 2⁸ = 13561683307 is a prime.

It is a super-2 number, since 2×13561683563² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13561683503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23870 + ... + 166412.

It is an arithmetic number, because the mean of its divisors is an integer number (1715873400).

Almost surely, 2^13561683563 is an apocalyptic number.

13561683563 is a deficient number, since it is larger than the sum of its proper divisors (165303637).

13561683563 is a wasteful number, since it uses less digits than its factorization.

13561683563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143701.

The product of its digits is 1166400, while the sum is 47.

The spelling of 13561683563 in words is "thirteen billion, five hundred sixty-one million, six hundred eighty-three thousand, five hundred sixty-three".