6501661565115 has 16 divisors (see below), whose sum is σ = 10412389735200. Its totient is φ = 3464309091072.

The previous prime is 6501661565111. The next prime is 6501661565131. The reversal of 6501661565115 is 5115651661056.

It is not a de Polignac number, because 6501661565115 - 2² = 6501661565111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6501661565111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202717410 + ... + 202749479.

It is an arithmetic number, because the mean of its divisors is an integer number (650774358450).

Almost surely, 2^{6501661565115} is an apocalyptic number.

6501661565115 is a deficient number, since it is larger than the sum of its proper divisors (3910728170085).

6501661565115 is a wasteful number, since it uses less digits than its factorization.

6501661565115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405467966.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 6501661565115 in words is "six trillion, five hundred one billion, six hundred sixty-one million, five hundred sixty-five thousand, one hundred fifteen".