647822652847 has 2 divisors, whose sum is σ = 647822652848. Its totient is φ = 647822652846.

The previous prime is 647822652793. The next prime is 647822652859. The reversal of 647822652847 is 748256228746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647822652847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647822682847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323911326423 + 323911326424.

It is an arithmetic number, because the mean of its divisors is an integer number (323911326424).

Almost surely, 2^647822652847 is an apocalyptic number.

647822652847 is a deficient number, since it is larger than the sum of its proper divisors (1).

647822652847 is an equidigital number, since it uses as much as digits as its factorization.

647822652847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72253440, while the sum is 61.

The spelling of 647822652847 in words is "six hundred forty-seven billion, eight hundred twenty-two million, six hundred fifty-two thousand, eight hundred forty-seven".