647118894713 has 8 divisors (see below), whose sum is σ = 657780532200. Its totient is φ = 636532604928.

The previous prime is 647118894707. The next prime is 647118894739. The reversal of 647118894713 is 317498811746.

It can be written as a sum of positive squares in 4 ways, for example, as 124204790329 + 522914104384 = 352427^2 + 723128^2 .

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 647118894713 - 2⁶ = 647118894649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647118894013) 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, 18819608 + ... + 18853961.

It is an arithmetic number, because the mean of its divisors is an integer number (82222566525).

Almost surely, 2^647118894713 is an apocalyptic number.

It is an amenable number.

647118894713 is a deficient number, since it is larger than the sum of its proper divisors (10661637487).

647118894713 is a wasteful number, since it uses less digits than its factorization.

647118894713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37673851.

The product of its digits is 8128512, while the sum is 59.

The spelling of 647118894713 in words is "six hundred forty-seven billion, one hundred eighteen million, eight hundred ninety-four thousand, seven hundred thirteen".