639654005330 has 64 divisors (see below), whose sum is σ = 1245230426880. Its totient is φ = 235937712384.

The previous prime is 639654005321. The next prime is 639654005351. The reversal of 639654005330 is 33500456936.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 582797 + ... + 1272383.

It is an arithmetic number, because the mean of its divisors is an integer number (19456725420).

Almost surely, 2^639654005330 is an apocalyptic number.

639654005330 is a deficient number, since it is larger than the sum of its proper divisors (605576421550).

639654005330 is a wasteful number, since it uses less digits than its factorization.

639654005330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689763.

The product of its (nonzero) digits is 874800, while the sum is 44.

The spelling of 639654005330 in words is "six hundred thirty-nine billion, six hundred fifty-four million, five thousand, three hundred thirty".