647789164517 has 16 divisors (see below), whose sum is σ = 711743506944. Its totient is φ = 584683110000.

The previous prime is 647789164501. The next prime is 647789164523. The reversal of 647789164517 is 715461987746.

It is not a de Polignac number, because 647789164517 - 2⁴ = 647789164501 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 (647789164567) 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, 2996642 + ... + 3205532.

It is an arithmetic number, because the mean of its divisors is an integer number (44483969184).

Almost surely, 2^647789164517 is an apocalyptic number.

It is an amenable number.

647789164517 is a deficient number, since it is larger than the sum of its proper divisors (63954342427).

647789164517 is a wasteful number, since it uses less digits than its factorization.

647789164517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210920.

The product of its digits is 71124480, while the sum is 65.

The spelling of 647789164517 in words is "six hundred forty-seven billion, seven hundred eighty-nine million, one hundred sixty-four thousand, five hundred seventeen".