11155566711 has 16 divisors (see below), whose sum is σ = 15281883008. Its totient is φ = 7233300000.

The previous prime is 11155566707. The next prime is 11155566733. The reversal of 11155566711 is 11766555111.

It is not a de Polignac number, because 11155566711 - 2² = 11155566707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11155566711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155566791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298836 + ... + 334086.

It is an arithmetic number, because the mean of its divisors is an integer number (955117688).

Almost surely, 2^11155566711 is an apocalyptic number.

11155566711 is a deficient number, since it is larger than the sum of its proper divisors (4126316297).

11155566711 is a wasteful number, since it uses less digits than its factorization.

11155566711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38142.

The product of its digits is 31500, while the sum is 39.

The spelling of 11155566711 in words is "eleven billion, one hundred fifty-five million, five hundred sixty-six thousand, seven hundred eleven".