6513550065 has 32 divisors (see below), whose sum is σ = 12632342400. Its totient is φ = 3158084160.

The previous prime is 6513550061. The next prime is 6513550091. The reversal of 6513550065 is 5600553156.

6513550065 is a `hidden beast` number, since 65 + 1 + 35 + 500 + 65 = 666.

It is not a de Polignac number, because 6513550065 - 2² = 6513550061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6513550061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2191630 + ... + 2194599.

It is an arithmetic number, because the mean of its divisors is an integer number (394760700).

Almost surely, 2^6513550065 is an apocalyptic number.

It is an amenable number.

6513550065 is a deficient number, since it is larger than the sum of its proper divisors (6118792335).

6513550065 is a wasteful number, since it uses less digits than its factorization.

6513550065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386254 (or 4386248 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 6513550065 is about 80706.5676695521. The cubic root of 6513550065 is about 1867.5514929109.

The spelling of 6513550065 in words is "six billion, five hundred thirteen million, five hundred fifty thousand, sixty-five".