647607736847 has 8 divisors (see below), whose sum is σ = 653967712320. Its totient is φ = 641258795520.

The previous prime is 647607736781. The next prime is 647607736871. The reversal of 647607736847 is 748637706746.

It is a happy number.

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 647607736847 - 2²⁶ = 647540627983 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 (647607735847) 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, 2640554 + ... + 2875367.

It is an arithmetic number, because the mean of its divisors is an integer number (81745964040).

Almost surely, 2^647607736847 is an apocalyptic number.

647607736847 is a deficient number, since it is larger than the sum of its proper divisors (6359975473).

647607736847 is a wasteful number, since it uses less digits than its factorization.

647607736847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517073.

The product of its (nonzero) digits is 199148544, while the sum is 65.

The spelling of 647607736847 in words is "six hundred forty-seven billion, six hundred seven million, seven hundred thirty-six thousand, eight hundred forty-seven".