640140908589 has 48 divisors (see below), whose sum is σ = 1138203644032. Its totient is φ = 337604713344.

The previous prime is 640140908581. The next prime is 640140908633. The reversal of 640140908589 is 985809041046.

640140908589 is a `hidden beast` number, since 6 + 40 + 14 + 0 + 9 + 0 + 8 + 589 = 666.

It is not a de Polignac number, because 640140908589 - 2³ = 640140908581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640140908581) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 5580399 + ... + 5693955.

Almost surely, 2^640140908589 is an apocalyptic number.

It is an amenable number.

640140908589 is a deficient number, since it is larger than the sum of its proper divisors (498062735443).

640140908589 is a wasteful number, since it uses less digits than its factorization.

640140908589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120466 (or 120463 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 640140908589 in words is "six hundred forty billion, one hundred forty million, nine hundred eight thousand, five hundred eighty-nine".