6501798911 has 4 divisors (see below), whose sum is σ = 6508321272. Its totient is φ = 6495276552.

The previous prime is 6501798899. The next prime is 6501798913. The reversal of 6501798911 is 1198971056.

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

It is a cyclic number.

It is not a de Polignac number, because 6501798911 - 2³⁰ = 5428057087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501798913) 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 3 ways as a sum of consecutive naturals, for example, 3259685 + ... + 3261678.

It is an arithmetic number, because the mean of its divisors is an integer number (1627080318).

Almost surely, 2^6501798911 is an apocalyptic number.

6501798911 is a deficient number, since it is larger than the sum of its proper divisors (6522361).

6501798911 is an equidigital number, since it uses as much as digits as its factorization.

6501798911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522360.

The product of its (nonzero) digits is 136080, while the sum is 47.

The square root of 6501798911 is about 80633.7330836171. The cubic root of 6501798911 is about 1866.4277280510.

The spelling of 6501798911 in words is "six billion, five hundred one million, seven hundred ninety-eight thousand, nine hundred eleven".