6506604855 has 40 divisors (see below), whose sum is σ = 11677210512. Its totient is φ = 3466167552.

The previous prime is 6506604827. The next prime is 6506604859. The reversal of 6506604855 is 5584066056.

It is a happy number.

6506604855 is a `hidden beast` number, since 6 + 506 + 60 + 4 + 85 + 5 = 666.

It is not a de Polignac number, because 6506604855 - 2¹¹ = 6506602807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6506604855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506604859) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 358479 + ... + 376191.

Almost surely, 2^6506604855 is an apocalyptic number.

6506604855 is a deficient number, since it is larger than the sum of its proper divisors (5170605657).

6506604855 is a wasteful number, since it uses less digits than its factorization.

6506604855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18637 (or 18628 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The square root of 6506604855 is about 80663.5286545289. The cubic root of 6506604855 is about 1866.8874848076.

The spelling of 6506604855 in words is "six billion, five hundred six million, six hundred four thousand, eight hundred fifty-five".