640116936964 has 6 divisors (see below), whose sum is σ = 1120204639694. Its totient is φ = 320058468480.

The previous prime is 640116936961. The next prime is 640116936989. The reversal of 640116936964 is 469639611046.

It can be written as a sum of positive squares in only one way, i.e., 572806785600 + 67310151364 = 756840^2 + 259442^2 .

It is not an unprimeable number, because it can be changed into a prime (640116936961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80014617117 + ... + 80014617124.

Almost surely, 2^640116936964 is an apocalyptic number.

It is an amenable number.

640116936964 is a deficient number, since it is larger than the sum of its proper divisors (480087702730).

640116936964 is a wasteful number, since it uses less digits than its factorization.

640116936964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160029234245 (or 160029234243 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 640116936964 in words is "six hundred forty billion, one hundred sixteen million, nine hundred thirty-six thousand, nine hundred sixty-four".