6400064046465 has 96 divisors (see below), whose sum is σ = 11569235318784. Its totient is φ = 3270056025600.

The previous prime is 6400064046463. The next prime is 6400064046473. The reversal of 6400064046465 is 5646404600046.

It is not a de Polignac number, because 6400064046465 - 2¹ = 6400064046463 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 6400064046465.

It is not an unprimeable number, because it can be changed into a prime (6400064046463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 411545440 + ... + 411560990.

It is an arithmetic number, because the mean of its divisors is an integer number (120512867904).

Almost surely, 2^{6400064046465} is an apocalyptic number.

It is an amenable number.

6400064046465 is a deficient number, since it is larger than the sum of its proper divisors (5169171272319).

6400064046465 is a wasteful number, since it uses less digits than its factorization.

6400064046465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19671 (or 19668 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 6400064046465 in words is "six trillion, four hundred billion, sixty-four million, forty-six thousand, four hundred sixty-five".