647555823041 has 8 divisors (see below), whose sum is σ = 659815047720. Its totient is φ = 635298124032.

The previous prime is 647555822989. The next prime is 647555823059. The reversal of 647555823041 is 140328555746.

647555823041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 28809970225 + 618745852816 = 169735^2 + 786604^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647555823041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647555823241) 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, 494351 + ... + 1240763.

It is an arithmetic number, because the mean of its divisors is an integer number (82476880965).

Almost surely, 2^647555823041 is an apocalyptic number.

It is an amenable number.

647555823041 is a deficient number, since it is larger than the sum of its proper divisors (12259224679).

647555823041 is a wasteful number, since it uses less digits than its factorization.

647555823041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762835.

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 647555823041 in words is "six hundred forty-seven billion, five hundred fifty-five million, eight hundred twenty-three thousand, forty-one".