11155442434399 has 4 divisors (see below), whose sum is σ = 11296650566560. Its totient is φ = 11014234302240.

The previous prime is 11155442434369. The next prime is 11155442434403. The reversal of 11155442434399 is 99343424455111.

It is a happy number.

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 11155442434399 - 2²⁷ = 11155308216671 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 (11155442434369) 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, 70604065962 + ... + 70604066119.

It is an arithmetic number, because the mean of its divisors is an integer number (2824162641640).

Almost surely, 2^{11155442434399} is an apocalyptic number.

11155442434399 is a deficient number, since it is larger than the sum of its proper divisors (141208132161).

11155442434399 is an equidigital number, since it uses as much as digits as its factorization.

11155442434399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141208132160.

The product of its digits is 9331200, while the sum is 55.

The spelling of 11155442434399 in words is "eleven trillion, one hundred fifty-five billion, four hundred forty-two million, four hundred thirty-four thousand, three hundred ninety-nine".