4647805066639 has 4 divisors (see below), whose sum is σ = 5311777219024. Its totient is φ = 3983832914256.

The previous prime is 4647805066637. The next prime is 4647805066711. The reversal of 4647805066639 is 9366605087464.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4647805066639 - 2¹ = 4647805066637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4647805066637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331986076182 + ... + 331986076195.

It is an arithmetic number, because the mean of its divisors is an integer number (1327944304756).

Almost surely, 2^{4647805066639} is an apocalyptic number.

4647805066639 is a deficient number, since it is larger than the sum of its proper divisors (663972152385).

4647805066639 is an equidigital number, since it uses as much as digits as its factorization.

4647805066639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663972152384.

The product of its (nonzero) digits is 156764160, while the sum is 64.

The spelling of 4647805066639 in words is "four trillion, six hundred forty-seven billion, eight hundred five million, sixty-six thousand, six hundred thirty-nine".