640770044373075 has 12 divisors (see below), whose sum is σ = 1059406473363608. Its totient is φ = 341744023665600.

The previous prime is 640770044373073. The next prime is 640770044373227. The reversal of 640770044373075 is 570373440077046.

It is not a de Polignac number, because 640770044373075 - 2¹ = 640770044373073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640770044373073) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4271800295746 + ... + 4271800295895.

Almost surely, 2^{640770044373075} is an apocalyptic number.

640770044373075 is a deficient number, since it is larger than the sum of its proper divisors (418636428990533).

640770044373075 is a wasteful number, since it uses less digits than its factorization.

640770044373075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543600591654 (or 8543600591649 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 57.

The spelling of 640770044373075 in words is "six hundred forty trillion, seven hundred seventy billion, forty-four million, three hundred seventy-three thousand, seventy-five".