647705948241 has 24 divisors (see below), whose sum is σ = 954073657152. Its totient is φ = 390556381600.

The previous prime is 647705948189. The next prime is 647705948243. The reversal of 647705948241 is 142849507746.

It is not a de Polignac number, because 647705948241 - 2⁹ = 647705947729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647705948243) 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 23 ways as a sum of consecutive naturals, for example, 4457205 + ... + 4600226.

It is an arithmetic number, because the mean of its divisors is an integer number (39753069048).

Almost surely, 2^647705948241 is an apocalyptic number.

It is an amenable number.

647705948241 is a deficient number, since it is larger than the sum of its proper divisors (306367708911).

647705948241 is a wasteful number, since it uses less digits than its factorization.

647705948241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057653 (or 9057642 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 647705948241 in words is "six hundred forty-seven billion, seven hundred five million, nine hundred forty-eight thousand, two hundred forty-one".