6405505000505 has 16 divisors (see below), whose sum is σ = 8355246790464. Its totient is φ = 4686011417280.

The previous prime is 6405505000487. The next prime is 6405505000513. The reversal of 6405505000505 is 5050005055046.

It is not a de Polignac number, because 6405505000505 - 2²⁶ = 6405437891641 is a prime.

It is a super-2 number, since 2×6405505000505² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460489451 + ... + 460503360.

It is an arithmetic number, because the mean of its divisors is an integer number (522202924404).

Almost surely, 2^{6405505000505} is an apocalyptic number.

6405505000505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6405505000505 is a deficient number, since it is larger than the sum of its proper divisors (1949741789959).

6405505000505 is a wasteful number, since it uses less digits than its factorization.

6405505000505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920992936.

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 6405505000505 in words is "six trillion, four hundred five billion, five hundred five million, five hundred five", and thus it is an aban number.