640446450335 has 8 divisors (see below), whose sum is σ = 768832373376. Its totient is φ = 512159404960.

The previous prime is 640446450313. The next prime is 640446450341. The reversal of 640446450335 is 533054644046.

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

It is not a de Polignac number, because 640446450335 - 2¹⁴ = 640446433951 is a prime.

It is a super-2 number, since 2×640446450335² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24705164 + ... + 24731073.

It is an arithmetic number, because the mean of its divisors is an integer number (96104046672).

Almost surely, 2^640446450335 is an apocalyptic number.

640446450335 is a deficient number, since it is larger than the sum of its proper divisors (128385923041).

640446450335 is a wasteful number, since it uses less digits than its factorization.

640446450335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49438833.

The product of its (nonzero) digits is 2073600, while the sum is 44.

The spelling of 640446450335 in words is "six hundred forty billion, four hundred forty-six million, four hundred fifty thousand, three hundred thirty-five".