6509201655 has 48 divisors (see below), whose sum is σ = 12121032672. Its totient is φ = 2970316800.

The previous prime is 6509201651. The next prime is 6509201707. The reversal of 6509201655 is 5561029056.

6509201655 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6509201655 - 2² = 6509201651 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509201651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74626 + ... + 136335.

It is an arithmetic number, because the mean of its divisors is an integer number (252521514).

Almost surely, 2^6509201655 is an apocalyptic number.

6509201655 is a deficient number, since it is larger than the sum of its proper divisors (5611831017).

6509201655 is a wasteful number, since it uses less digits than its factorization.

6509201655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211008 (or 210997 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 6509201655 is about 80679.6235427509. The cubic root of 6509201655 is about 1867.1358113789.

The spelling of 6509201655 in words is "six billion, five hundred nine million, two hundred one thousand, six hundred fifty-five".