640091005329 has 8 divisors (see below), whose sum is σ = 858690592672. Its totient is φ = 424109377440.

The previous prime is 640091005313. The next prime is 640091005373. The reversal of 640091005329 is 923500190046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640091005329 - 2⁴ = 640091005313 is a prime.

It is a super-3 number, since 3×640091005329³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640091075329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654489292 + ... + 654490269.

It is an arithmetic number, because the mean of its divisors is an integer number (107336324084).

Almost surely, 2^640091005329 is an apocalyptic number.

It is an amenable number.

640091005329 is a deficient number, since it is larger than the sum of its proper divisors (218599587343).

640091005329 is a wasteful number, since it uses less digits than its factorization.

640091005329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308979727.

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 640091005329 in words is "six hundred forty billion, ninety-one million, five thousand, three hundred twenty-nine".