6500055601 has 4 divisors (see below), whose sum is σ = 7000059892. Its totient is φ = 6000051312.

The previous prime is 6500055593. The next prime is 6500055613. The reversal of 6500055601 is 1065500056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 856440225 + 5643615376 = 29265^2 + 75124^2 .

It is a cyclic number.

It is not a de Polignac number, because 6500055601 - 2³ = 6500055593 is a prime.

It is a super-4 number, since 4×6500055601⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6500055601.

It is not an unprimeable number, because it can be changed into a prime (6500055631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250002126 + ... + 250002151.

It is an arithmetic number, because the mean of its divisors is an integer number (1750014973).

Almost surely, 2^6500055601 is an apocalyptic number.

It is an amenable number.

6500055601 is a deficient number, since it is larger than the sum of its proper divisors (500004291).

6500055601 is a wasteful number, since it uses less digits than its factorization.

6500055601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500004290.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 6500055601 is about 80622.9223050120. The cubic root of 6500055601 is about 1866.2608997102.

Adding to 6500055601 its reverse (1065500056), we get a palindrome (7565555657).

The spelling of 6500055601 in words is "six billion, five hundred million, fifty-five thousand, six hundred one".