11611563 has 16 divisors (see below), whose sum is σ = 15812640. Its totient is φ = 7577856.

The previous prime is 11611559. The next prime is 11611597. The reversal of 11611563 is 36511611.

11611563 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 11611563 - 2² = 11611559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11611543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41781 + ... + 42057.

It is an arithmetic number, because the mean of its divisors is an integer number (988290).

Almost surely, 2^11611563 is an apocalyptic number.

11611563 is a deficient number, since it is larger than the sum of its proper divisors (4201077).

11611563 is a wasteful number, since it uses less digits than its factorization.

11611563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its digits is 540, while the sum is 24.

The square root of 11611563 is about 3407.5743572225. The cubic root of 11611563 is about 226.4454302798.

The spelling of 11611563 in words is "eleven million, six hundred eleven thousand, five hundred sixty-three".