11116661511511 has 8 divisors (see below), whose sum is σ = 11770624439424. Its totient is φ = 10462703212800.

The previous prime is 11116661511503. The next prime is 11116661511541. The reversal of 11116661511511 is 11511516661111.

It is a happy number.

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 11116661511511 - 2³ = 11116661511503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11116661511541) 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, 4607226 + ... + 6592408.

It is an arithmetic number, because the mean of its divisors is an integer number (1471328054928).

Almost surely, 2^{11116661511511} is an apocalyptic number.

11116661511511 is a deficient number, since it is larger than the sum of its proper divisors (653962927913).

11116661511511 is a wasteful number, since it uses less digits than its factorization.

11116661511511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314601.

The product of its digits is 5400, while the sum is 37.

The spelling of 11116661511511 in words is "eleven trillion, one hundred sixteen billion, six hundred sixty-one million, five hundred eleven thousand, five hundred eleven".