6468281389505 has 64 divisors (see below), whose sum is σ = 8816895360000. Its totient is φ = 4521519055872.

The previous prime is 6468281389477. The next prime is 6468281389517. The reversal of 6468281389505 is 5059831828646.

It is not a de Polignac number, because 6468281389505 - 2²⁶ = 6468214280641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Curzon number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 139743956 + ... + 139790234.

It is an arithmetic number, because the mean of its divisors is an integer number (137763990000).

Almost surely, 2^{6468281389505} is an apocalyptic number.

6468281389505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6468281389505 is a deficient number, since it is larger than the sum of its proper divisors (2348613970495).

6468281389505 is a wasteful number, since it uses less digits than its factorization.

6468281389505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47778.

The product of its (nonzero) digits is 99532800, while the sum is 65.

The spelling of 6468281389505 in words is "six trillion, four hundred sixty-eight billion, two hundred eighty-one million, three hundred eighty-nine thousand, five hundred five".