11518235256667 has 4 divisors (see below), whose sum is σ = 11524073188320. Its totient is φ = 11512397325016.

The previous prime is 11518235256659. The next prime is 11518235256679. The reversal of 11518235256667 is 76665253281511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11518235256667 - 2³ = 11518235256659 is a prime.

It is a super-2 number, since 2×11518235256667² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11518235256467) 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 3 ways as a sum of consecutive naturals, for example, 2918962867 + ... + 2918966812.

It is an arithmetic number, because the mean of its divisors is an integer number (2881018297080).

Almost surely, 2^{11518235256667} is an apocalyptic number.

11518235256667 is a deficient number, since it is larger than the sum of its proper divisors (5837931653).

11518235256667 is an equidigital number, since it uses as much as digits as its factorization.

11518235256667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837931652.

The product of its digits is 18144000, while the sum is 58.

The spelling of 11518235256667 in words is "eleven trillion, five hundred eighteen billion, two hundred thirty-five million, two hundred fifty-six thousand, six hundred sixty-seven".