640459833129 has 12 divisors (see below), whose sum is σ = 938916240496. Its totient is φ = 420600487032.

The previous prime is 640459833109. The next prime is 640459833163. The reversal of 640459833129 is 921338954046.

640459833129 is a `hidden beast` number, since 6 + 4 + 0 + 4 + 598 + 33 + 12 + 9 = 666.

It is not a de Polignac number, because 640459833129 - 2²⁴ = 640443055913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640459833109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 531060619 + ... + 531061824.

Almost surely, 2^640459833129 is an apocalyptic number.

It is an amenable number.

640459833129 is a deficient number, since it is larger than the sum of its proper divisors (298456407367).

640459833129 is a wasteful number, since it uses less digits than its factorization.

640459833129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062122516 (or 1062122513 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 640459833129 in words is "six hundred forty billion, four hundred fifty-nine million, eight hundred thirty-three thousand, one hundred twenty-nine".