6516555065505 has 96 divisors (see below), whose sum is σ = 12375730698240. Its totient is φ = 3280422317760.

The previous prime is 6516555065497. The next prime is 6516555065509. The reversal of 6516555065505 is 5055605556156.

6516555065505 is a `hidden beast` number, since 65 + 16 + 5 + 5 + 5 + 0 + 65 + 505 = 666.

It is not a de Polignac number, because 6516555065505 - 2³ = 6516555065497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6516555065509) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5735214 + ... + 6776856.

It is an arithmetic number, because the mean of its divisors is an integer number (128913861440).

Almost surely, 2^{6516555065505} is an apocalyptic number.

It is an amenable number.

6516555065505 is a deficient number, since it is larger than the sum of its proper divisors (5859175632735).

6516555065505 is a wasteful number, since it uses less digits than its factorization.

6516555065505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041953 (or 1041941 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 54.

The spelling of 6516555065505 in words is "six trillion, five hundred sixteen billion, five hundred fifty-five million, sixty-five thousand, five hundred five".