647516832617 has 4 divisors (see below), whose sum is σ = 647551476036. Its totient is φ = 647482189200.

The previous prime is 647516832607. The next prime is 647516832691. The reversal of 647516832617 is 716238615746.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 240120580441 + 407396252176 = 490021^2 + 638276^2 .

It is a cyclic number.

It is not a de Polignac number, because 647516832617 - 2⁶ = 647516832553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647516832607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17293658 + ... + 17331059.

It is an arithmetic number, because the mean of its divisors is an integer number (161887869009).

Almost surely, 2^647516832617 is an apocalyptic number.

It is an amenable number.

647516832617 is a deficient number, since it is larger than the sum of its proper divisors (34643419).

647516832617 is a wasteful number, since it uses less digits than its factorization.

647516832617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34643418.

The product of its digits is 10160640, while the sum is 56.

The spelling of 647516832617 in words is "six hundred forty-seven billion, five hundred sixteen million, eight hundred thirty-two thousand, six hundred seventeen".