647711802371 has 2 divisors, whose sum is σ = 647711802372. Its totient is φ = 647711802370.

The previous prime is 647711802341. The next prime is 647711802377. The reversal of 647711802371 is 173208117746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647711802371 is a prime.

It is a super-2 number, since 2×647711802371² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (647711802377) 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 as a sum of consecutive naturals, namely, 323855901185 + 323855901186.

It is an arithmetic number, because the mean of its divisors is an integer number (323855901186).

Almost surely, 2^647711802371 is an apocalyptic number.

647711802371 is a deficient number, since it is larger than the sum of its proper divisors (1).

647711802371 is an equidigital number, since it uses as much as digits as its factorization.

647711802371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 647711802371 in words is "six hundred forty-seven billion, seven hundred eleven million, eight hundred two thousand, three hundred seventy-one".