1965655201 has 2 divisors, whose sum is σ = 1965655202. Its totient is φ = 1965655200.

The previous prime is 1965655199. The next prime is 1965655217. The reversal of 1965655201 is 1025565691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1899216400 + 66438801 = 43580^2 + 8151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965655201 - 2¹ = 1965655199 is a prime.

Together with 1965655199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1965655231) 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, 982827600 + 982827601.

It is an arithmetic number, because the mean of its divisors is an integer number (982827601).

Almost surely, 2^1965655201 is an apocalyptic number.

It is an amenable number.

1965655201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965655201 is an equidigital number, since it uses as much as digits as its factorization.

1965655201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 1965655201 is about 44335.7102232501. The cubic root of 1965655201 is about 1252.6674134223.

The spelling of 1965655201 in words is "one billion, nine hundred sixty-five million, six hundred fifty-five thousand, two hundred one".