640452326330 has 8 divisors (see below), whose sum is σ = 1152814187412. Its totient is φ = 256180930528.

The previous prime is 640452326317. The next prime is 640452326351. The reversal of 640452326330 is 33623254046.

It can be written as a sum of positive squares in 2 ways, for example, as 621869456569 + 18582869761 = 788587^2 + 136319^2 .

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

It is a super-2 number, since 2×640452326330² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32022616307 + ... + 32022616326.

Almost surely, 2^640452326330 is an apocalyptic number.

640452326330 is a deficient number, since it is larger than the sum of its proper divisors (512361861082).

640452326330 is a wasteful number, since it uses less digits than its factorization.

640452326330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64045232640.

The product of its (nonzero) digits is 311040, while the sum is 38.

The spelling of 640452326330 in words is "six hundred forty billion, four hundred fifty-two million, three hundred twenty-six thousand, three hundred thirty".