2017641649 has 2 divisors, whose sum is σ = 2017641650. Its totient is φ = 2017641648.

The previous prime is 2017641641. The next prime is 2017641653. The reversal of 2017641649 is 9461467102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1132995600 + 884646049 = 33660^2 + 29743^2 .

It is a cyclic number.

It is not a de Polignac number, because 2017641649 - 2³ = 2017641641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2017641641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008820824 + 1008820825.

It is an arithmetic number, because the mean of its divisors is an integer number (1008820825).

Almost surely, 2^2017641649 is an apocalyptic number.

It is an amenable number.

2017641649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2017641649 is an equidigital number, since it uses as much as digits as its factorization.

2017641649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 2017641649 is about 44918.1661357629. The cubic root of 2017641649 is about 1263.6147248255.

The spelling of 2017641649 in words is "two billion, seventeen million, six hundred forty-one thousand, six hundred forty-nine".