611145563 has 16 divisors (see below), whose sum is σ = 763398144. Its totient is φ = 477118080.

The previous prime is 611145551. The next prime is 611145589. The reversal of 611145563 is 365541116.

It is a cyclic number.

It is not a de Polignac number, because 611145563 - 2⁶ = 611145499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611145533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79145 + ... + 86522.

It is an arithmetic number, because the mean of its divisors is an integer number (47712384).

Almost surely, 2^611145563 is an apocalyptic number.

611145563 is a deficient number, since it is larger than the sum of its proper divisors (152252581).

611145563 is a wasteful number, since it uses less digits than its factorization.

611145563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165722.

The product of its digits is 10800, while the sum is 32.

The square root of 611145563 is about 24721.3584375940. The cubic root of 611145563 is about 848.6231749525.

Adding to 611145563 its reverse (365541116), we get a palindrome (976686679).

The spelling of 611145563 in words is "six hundred eleven million, one hundred forty-five thousand, five hundred sixty-three".