11518436563 has 8 divisors (see below), whose sum is σ = 11538929088. Its totient is φ = 11497964544.

The previous prime is 11518436533. The next prime is 11518436597. The reversal of 11518436563 is 36563481511.

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 11518436563 - 2²¹ = 11516339411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11518436533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1468470 + ... + 1476292.

It is an arithmetic number, because the mean of its divisors is an integer number (1442366136).

Almost surely, 2^11518436563 is an apocalyptic number.

11518436563 is a deficient number, since it is larger than the sum of its proper divisors (20492525).

11518436563 is a wasteful number, since it uses less digits than its factorization.

11518436563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253.

The product of its digits is 259200, while the sum is 43.

The spelling of 11518436563 in words is "eleven billion, five hundred eighteen million, four hundred thirty-six thousand, five hundred sixty-three".