647891513607 has 16 divisors (see below), whose sum is σ = 930322786400. Its totient is φ = 398695174272.

The previous prime is 647891513557. The next prime is 647891513627. The reversal of 647891513607 is 706315198746.

It is a happy number.

It is not a de Polignac number, because 647891513607 - 2⁸ = 647891513351 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 (647891513627) 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, 2669769 + ... + 2902317.

It is an arithmetic number, because the mean of its divisors is an integer number (58145174150).

Almost surely, 2^647891513607 is an apocalyptic number.

647891513607 is a deficient number, since it is larger than the sum of its proper divisors (282431272793).

647891513607 is a wasteful number, since it uses less digits than its factorization.

647891513607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304002.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 647891513607 in words is "six hundred forty-seven billion, eight hundred ninety-one million, five hundred thirteen thousand, six hundred seven".