646946092801 has 2 divisors, whose sum is σ = 646946092802. Its totient is φ = 646946092800.

The previous prime is 646946092799. The next prime is 646946092841. The reversal of 646946092801 is 108290649646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594402450625 + 52543642176 = 770975^2 + 229224^2 .

It is a cyclic number.

It is not a de Polignac number, because 646946092801 - 2¹ = 646946092799 is a prime.

Together with 646946092799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (646946092841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323473046400 + 323473046401.

It is an arithmetic number, because the mean of its divisors is an integer number (323473046401).

Almost surely, 2^646946092801 is an apocalyptic number.

It is an amenable number.

646946092801 is a deficient number, since it is larger than the sum of its proper divisors (1).

646946092801 is an equidigital number, since it uses as much as digits as its factorization.

646946092801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 646946092801 in words is "six hundred forty-six billion, nine hundred forty-six million, ninety-two thousand, eight hundred one".