11518664517 has 48 divisors (see below), whose sum is σ = 18466576128. Its totient is φ = 6886978560.

The previous prime is 11518664471. The next prime is 11518664537. The reversal of 11518664517 is 71546681511.

11518664517 is a `hidden beast` number, since 1 + 1 + 51 + 86 + 6 + 4 + 517 = 666.

It is not a de Polignac number, because 11518664517 - 2⁶ = 11518664453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11518664537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248388 + ... + 291090.

It is an arithmetic number, because the mean of its divisors is an integer number (384720336).

Almost surely, 2^11518664517 is an apocalyptic number.

11518664517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11518664517 is a deficient number, since it is larger than the sum of its proper divisors (6947911611).

11518664517 is a wasteful number, since it uses less digits than its factorization.

11518664517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42810 (or 42807 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

It can be divided in two parts, 1151 and 8664517, that added together give a palindrome (8665668).

The spelling of 11518664517 in words is "eleven billion, five hundred eighteen million, six hundred sixty-four thousand, five hundred seventeen".