640035164 has 12 divisors (see below), whose sum is σ = 1129974384. Its totient is φ = 317185344.

The previous prime is 640035163. The next prime is 640035167. The reversal of 640035164 is 461530046.

It is a happy number.

It is a super-2 number, since 2×640035164² = 819290022313013792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640035163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707552 + ... + 708455.

It is an arithmetic number, because the mean of its divisors is an integer number (94164532).

Almost surely, 2^640035164 is an apocalyptic number.

It is an amenable number.

640035164 is a deficient number, since it is larger than the sum of its proper divisors (489939220).

640035164 is a wasteful number, since it uses less digits than its factorization.

640035164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416124 (or 1416122 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 640035164 is about 25298.9162613737. The cubic root of 640035164 is about 861.7896587532.

The spelling of 640035164 in words is "six hundred forty million, thirty-five thousand, one hundred sixty-four".