11618681611 has 8 divisors (see below), whose sum is σ = 12026169344. Its totient is φ = 11213237160.

The previous prime is 11618681609. The next prime is 11618681617.

11618681611 is nontrivially palindromic in base 10.

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 11618681611 - 2¹ = 11618681609 is a prime.

It is a super-4 number, since 4×11618681611⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11618681617) 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, 499245 + ... + 521998.

It is an arithmetic number, because the mean of its divisors is an integer number (1503271168).

Almost surely, 2^11618681611 is an apocalyptic number.

11618681611 is a deficient number, since it is larger than the sum of its proper divisors (407487733).

11618681611 is a wasteful number, since it uses less digits than its factorization.

11618681611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021641.

The product of its digits is 13824, while the sum is 40.

The spelling of 11618681611 in words is "eleven billion, six hundred eighteen million, six hundred eighty-one thousand, six hundred eleven".