6500643101 has 2 divisors, whose sum is σ = 6500643102. Its totient is φ = 6500643100.

The previous prime is 6500643091. The next prime is 6500643113. The reversal of 6500643101 is 1013460056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5542802500 + 957840601 = 74450^2 + 30949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6500643101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6500643131) 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 as a sum of consecutive naturals, namely, 3250321550 + 3250321551.

It is an arithmetic number, because the mean of its divisors is an integer number (3250321551).

Almost surely, 2^6500643101 is an apocalyptic number.

It is an amenable number.

6500643101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6500643101 is an equidigital number, since it uses as much as digits as its factorization.

6500643101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 6500643101 is about 80626.5657274325. The cubic root of 6500643101 is about 1866.3171246265.

The spelling of 6500643101 in words is "six billion, five hundred million, six hundred forty-three thousand, one hundred one".