11155505049 has 24 divisors (see below), whose sum is σ = 17776259592. Its totient is φ = 6697486080.

The previous prime is 11155505041. The next prime is 11155505071. The reversal of 11155505049 is 94050555111.

11155505049 is a `hidden beast` number, since 1 + 1 + 15 + 550 + 50 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1849430025 + 9306075024 = 43005^2 + 96468^2 .

It is not a de Polignac number, because 11155505049 - 2³ = 11155505041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11155505041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1157962 + ... + 1167555.

It is an arithmetic number, because the mean of its divisors is an integer number (740677483).

Almost surely, 2^11155505049 is an apocalyptic number.

It is an amenable number.

11155505049 is a deficient number, since it is larger than the sum of its proper divisors (6620754543).

11155505049 is a wasteful number, since it uses less digits than its factorization.

11155505049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325577 (or 2325574 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 11155505049 in words is "eleven billion, one hundred fifty-five million, five hundred five thousand, forty-nine".