647899081211 has 2 divisors, whose sum is σ = 647899081212. Its totient is φ = 647899081210.

The previous prime is 647899081189. The next prime is 647899081213. The reversal of 647899081211 is 112180998746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647899081211 - 2³⁴ = 630719212027 is a prime.

Together with 647899081213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647899081213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323949540605 + 323949540606.

It is an arithmetic number, because the mean of its divisors is an integer number (323949540606).

Almost surely, 2^647899081211 is an apocalyptic number.

647899081211 is a deficient number, since it is larger than the sum of its proper divisors (1).

647899081211 is an equidigital number, since it uses as much as digits as its factorization.

647899081211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The spelling of 647899081211 in words is "six hundred forty-seven billion, eight hundred ninety-nine million, eighty-one thousand, two hundred eleven".