2168032561 has 2 divisors, whose sum is σ = 2168032562. Its totient is φ = 2168032560.

The previous prime is 2168032511. The next prime is 2168032571. The reversal of 2168032561 is 1652308612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149210000 + 1018822561 = 33900^2 + 31919^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168032561 - 2²³ = 2159643953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168032511) 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, 1084016280 + 1084016281.

It is an arithmetic number, because the mean of its divisors is an integer number (1084016281).

Almost surely, 2^2168032561 is an apocalyptic number.

It is an amenable number.

2168032561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168032561 is an equidigital number, since it uses as much as digits as its factorization.

2168032561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2168032561 is about 46562.1365596554. The cubic root of 2168032561 is about 1294.2612047920.

The spelling of 2168032561 in words is "two billion, one hundred sixty-eight million, thirty-two thousand, five hundred sixty-one".