639330347617 has 16 divisors (see below), whose sum is σ = 704899961920. Its totient is φ = 576116960832.

The previous prime is 639330347587. The next prime is 639330347627. The reversal of 639330347617 is 716743033936.

639330347617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 639330347617 - 2¹¹ = 639330345569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639330347627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737359 + ... + 1349947.

It is an arithmetic number, because the mean of its divisors is an integer number (44056247620).

Almost surely, 2^639330347617 is an apocalyptic number.

It is an amenable number.

639330347617 is a deficient number, since it is larger than the sum of its proper divisors (65569614303).

639330347617 is a wasteful number, since it uses less digits than its factorization.

639330347617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614512.

The product of its (nonzero) digits is 5143824, while the sum is 52.

The spelling of 639330347617 in words is "six hundred thirty-nine billion, three hundred thirty million, three hundred forty-seven thousand, six hundred seventeen".