640362054616 has 8 divisors (see below), whose sum is σ = 1200678852420. Its totient is φ = 320181027304.

The previous prime is 640362054613. The next prime is 640362054623. The reversal of 640362054616 is 616450263046.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×640362054616³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640362054613) 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 as a sum of consecutive naturals, namely, 40022628406 + ... + 40022628421.

Almost surely, 2^640362054616 is an apocalyptic number.

It is an amenable number.

640362054616 is a deficient number, since it is larger than the sum of its proper divisors (560316797804).

640362054616 is a wasteful number, since it uses less digits than its factorization.

640362054616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80045256833 (or 80045256829 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 640362054616 in words is "six hundred forty billion, three hundred sixty-two million, fifty-four thousand, six hundred sixteen".