5611511601 has 10 divisors (see below), whose sum is σ = 8382628562. Its totient is φ = 3741007680.

The previous prime is 5611511597. The next prime is 5611511627. The reversal of 5611511601 is 1061151165.

5611511601 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 51 + 1 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3997400625 + 1614110976 = 63225^2 + 40176^2 .

It is not a de Polignac number, because 5611511601 - 2² = 5611511597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611511651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 34638880 + ... + 34639041.

Almost surely, 2^5611511601 is an apocalyptic number.

It is an amenable number.

5611511601 is a deficient number, since it is larger than the sum of its proper divisors (2771116961).

5611511601 is an equidigital number, since it uses as much as digits as its factorization.

5611511601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69277933 (or 69277924 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 5611511601 is about 74910.0233680380. The cubic root of 5611511601 is about 1777.0239797794.

Adding to 5611511601 its reverse (1061151165), we get a palindrome (6672662766).

The spelling of 5611511601 in words is "five billion, six hundred eleven million, five hundred eleven thousand, six hundred one".