11155550311 has 4 divisors (see below), whose sum is σ = 11171066400. Its totient is φ = 11140034224.

The previous prime is 11155550309. The next prime is 11155550327. The reversal of 11155550311 is 11305555111.

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 11155550311 - 2¹ = 11155550309 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 11155550311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155550411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7756966 + ... + 7758403.

It is an arithmetic number, because the mean of its divisors is an integer number (2792766600).

Almost surely, 2^11155550311 is an apocalyptic number.

11155550311 is a deficient number, since it is larger than the sum of its proper divisors (15516089).

11155550311 is an equidigital number, since it uses as much as digits as its factorization.

11155550311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15516088.

The product of its (nonzero) digits is 1875, while the sum is 28.

The spelling of 11155550311 in words is "eleven billion, one hundred fifty-five million, five hundred fifty thousand, three hundred eleven".