640033670065 has 32 divisors (see below), whose sum is σ = 828559036800. Its totient is φ = 473056174080.

The previous prime is 640033670047. The next prime is 640033670083. The reversal of 640033670065 is 560076330046.

It is an interprime number because it is at equal distance from previous prime (640033670047) and next prime (640033670083).

It is not a de Polignac number, because 640033670065 - 2¹³ = 640033661873 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 2496271 + ... + 2740699.

It is an arithmetic number, because the mean of its divisors is an integer number (25892469900).

Almost surely, 2^640033670065 is an apocalyptic number.

It is an amenable number.

640033670065 is a deficient number, since it is larger than the sum of its proper divisors (188525366735).

640033670065 is a wasteful number, since it uses less digits than its factorization.

640033670065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245137.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 640033670065 in words is "six hundred forty billion, thirty-three million, six hundred seventy thousand, sixty-five".