647448542771 has 8 divisors (see below), whose sum is σ = 647861716800. Its totient is φ = 647035506880.

The previous prime is 647448542759. The next prime is 647448542803. The reversal of 647448542771 is 177245844746.

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-647448542771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647448542771.

It is not an unprimeable number, because it can be changed into a prime (647448542701) 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, 10304870 + ... + 10367508.

It is an arithmetic number, because the mean of its divisors is an integer number (80982714600).

Almost surely, 2^647448542771 is an apocalyptic number.

647448542771 is a deficient number, since it is larger than the sum of its proper divisors (413174029).

647448542771 is a wasteful number, since it uses less digits than its factorization.

647448542771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69069.

The product of its digits is 42147840, while the sum is 59.

The spelling of 647448542771 in words is "six hundred forty-seven billion, four hundred forty-eight million, five hundred forty-two thousand, seven hundred seventy-one".