11155055399 has 4 divisors (see below), whose sum is σ = 11414475336. Its totient is φ = 10895635464.

The previous prime is 11155055381. The next prime is 11155055419. The reversal of 11155055399 is 99355055111.

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 11155055399 - 2¹⁶ = 11154989863 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 (11155055309) 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, 129709904 + ... + 129709989.

It is an arithmetic number, because the mean of its divisors is an integer number (2853618834).

Almost surely, 2^11155055399 is an apocalyptic number.

11155055399 is a deficient number, since it is larger than the sum of its proper divisors (259419937).

11155055399 is an equidigital number, since it uses as much as digits as its factorization.

11155055399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259419936.

The product of its (nonzero) digits is 151875, while the sum is 44.

The spelling of 11155055399 in words is "eleven billion, one hundred fifty-five million, fifty-five thousand, three hundred ninety-nine".