6513661055 has 16 divisors (see below), whose sum is σ = 8647077888. Its totient is φ = 4670484000.

The previous prime is 6513661031. The next prime is 6513661081. The reversal of 6513661055 is 5501663156.

It is not a de Polignac number, because 6513661055 - 2¹⁰ = 6513660031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830111 + ... + 837920.

It is an arithmetic number, because the mean of its divisors is an integer number (540442368).

Almost surely, 2^6513661055 is an apocalyptic number.

6513661055 is a deficient number, since it is larger than the sum of its proper divisors (2133416833).

6513661055 is a wasteful number, since it uses less digits than its factorization.

6513661055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668118.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 6513661055 is about 80707.2552810464. The cubic root of 6513661055 is about 1867.5621004578.

The spelling of 6513661055 in words is "six billion, five hundred thirteen million, six hundred sixty-one thousand, fifty-five".