6503145065 has 16 divisors (see below), whose sum is σ = 8292255120. Its totient is φ = 4879042560.

The previous prime is 6503145059. The next prime is 6503145073. The reversal of 6503145065 is 5605413056.

It can be written as a sum of positive squares in 8 ways, for example, as 199261456 + 6303883609 = 14116^2 + 79397^2 .

It is not a de Polignac number, because 6503145065 - 2²² = 6498950761 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112250 + ... + 160019.

It is an arithmetic number, because the mean of its divisors is an integer number (518265945).

Almost surely, 2^6503145065 is an apocalyptic number.

It is an amenable number.

6503145065 is a deficient number, since it is larger than the sum of its proper divisors (1789110055).

6503145065 is a wasteful number, since it uses less digits than its factorization.

6503145065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272572.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 6503145065 is about 80642.0799892959. The cubic root of 6503145065 is about 1866.5565296236.

The spelling of 6503145065 in words is "six billion, five hundred three million, one hundred forty-five thousand, sixty-five".