11155879489 has 4 divisors (see below), whose sum is σ = 11156312260. Its totient is φ = 11155446720.

The previous prime is 11155879487. The next prime is 11155879549. The reversal of 11155879489 is 98497855111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6627262464 + 4528617025 = 81408^2 + 67295^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155879489 - 2¹ = 11155879487 is a prime.

It is a super-2 number, since 2×11155879489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155879481) 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, 175092 + ... + 230149.

It is an arithmetic number, because the mean of its divisors is an integer number (2789078065).

Almost surely, 2^11155879489 is an apocalyptic number.

It is an amenable number.

11155879489 is a deficient number, since it is larger than the sum of its proper divisors (432771).

11155879489 is an equidigital number, since it uses as much as digits as its factorization.

11155879489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432770.

The product of its digits is 3628800, while the sum is 58.

The spelling of 11155879489 in words is "eleven billion, one hundred fifty-five million, eight hundred seventy-nine thousand, four hundred eighty-nine".