639366284713 has 8 divisors (see below), whose sum is σ = 688562883848. Its totient is φ = 590171768064.

The previous prime is 639366284663. The next prime is 639366284719. The reversal of 639366284713 is 317482663936.

639366284713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30797793049 + 608568491664 = 175493^2 + 780108^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 639366284713 - 2³³ = 630776350121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639366284719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148945 + ... + 1140577.

It is an arithmetic number, because the mean of its divisors is an integer number (86070360481).

Almost surely, 2^639366284713 is an apocalyptic number.

It is an amenable number.

639366284713 is a deficient number, since it is larger than the sum of its proper divisors (49196599135).

639366284713 is a wasteful number, since it uses less digits than its factorization.

639366284713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041243.

The product of its digits is 23514624, while the sum is 58.

The spelling of 639366284713 in words is "six hundred thirty-nine billion, three hundred sixty-six million, two hundred eighty-four thousand, seven hundred thirteen".