11155649 has 8 divisors (see below), whose sum is σ = 11485320. Its totient is φ = 10828800.

The previous prime is 11155643. The next prime is 11155657. The reversal of 11155649 is 94655111.

It can be written as a sum of positive squares in 4 ways, for example, as 49 + 11155600 = 7^2 + 3340^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11155649 - 2²⁰ = 10107073 is a prime.

It is a super-2 number, since 2×11155649² = 248897009222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9317 + ... + 10445.

It is an arithmetic number, because the mean of its divisors is an integer number (1435665).

Almost surely, 2^11155649 is an apocalyptic number.

It is an amenable number.

11155649 is a deficient number, since it is larger than the sum of its proper divisors (329671).

11155649 is a wasteful number, since it uses less digits than its factorization.

11155649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its digits is 5400, while the sum is 32.

The square root of 11155649 is about 3340.0073353213. The cubic root of 11155649 is about 223.4420705114.

It can be divided in two parts, 111556 and 49, that multiplied together give a square (5466244 = 2338²).

The spelling of 11155649 in words is "eleven million, one hundred fifty-five thousand, six hundred forty-nine".