6481864305 has 144 divisors (see below), whose sum is σ = 13351338000. Its totient is φ = 2900136960.

The previous prime is 6481864289. The next prime is 6481864381. The reversal of 6481864305 is 5034681846.

6481864305 is a `hidden beast` number, since 64 + 81 + 86 + 430 + 5 = 666.

6481864305 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1644383601 + 4837480704 = 40551^2 + 69552^2 .

It is not a de Polignac number, because 6481864305 - 2⁴ = 6481864289 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35811315 + ... + 35811495.

It is an arithmetic number, because the mean of its divisors is an integer number (92717625).

Almost surely, 2^6481864305 is an apocalyptic number.

It is an amenable number.

6481864305 is an abundant number, since it is smaller than the sum of its proper divisors (6869473695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6481864305 is a wasteful number, since it uses less digits than its factorization.

6481864305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 6481864305 is about 80510.0261147641. The cubic root of 6481864305 is about 1864.5182774504.

The spelling of 6481864305 in words is "six billion, four hundred eighty-one million, eight hundred sixty-four thousand, three hundred five".