6511601111065 has 4 divisors (see below), whose sum is σ = 7813921333284. Its totient is φ = 5209280888848.

The previous prime is 6511601111039. The next prime is 6511601111083. The reversal of 6511601111065 is 5601111061156.

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 3252695211529 + 3258905899536 = 1803523^2 + 1805244^2 .

It is a cyclic number.

It is not a de Polignac number, because 6511601111065 - 2¹⁷ = 6511600979993 is a prime.

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 6511601111065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651160111102 + ... + 651160111111.

It is an arithmetic number, because the mean of its divisors is an integer number (1953480333321).

Almost surely, 2^{6511601111065} is an apocalyptic number.

It is an amenable number.

6511601111065 is a deficient number, since it is larger than the sum of its proper divisors (1302320222219).

6511601111065 is a wasteful number, since it uses less digits than its factorization.

6511601111065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302320222218.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 6511601111065 in words is "six trillion, five hundred eleven billion, six hundred one million, one hundred eleven thousand, sixty-five".