2182694561 has 2 divisors, whose sum is σ = 2182694562. Its totient is φ = 2182694560.

The previous prime is 2182694551. The next prime is 2182694603. The reversal of 2182694561 is 1654962812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377894400 + 804800161 = 37120^2 + 28369^2 .

It is a cyclic number.

It is not a de Polignac number, because 2182694561 - 2¹⁴ = 2182678177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2182694551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1091347280 + 1091347281.

It is an arithmetic number, because the mean of its divisors is an integer number (1091347281).

Almost surely, 2^2182694561 is an apocalyptic number.

It is an amenable number.

2182694561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2182694561 is an equidigital number, since it uses as much as digits as its factorization.

2182694561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 2182694561 is about 46719.3167865285. The cubic root of 2182694561 is about 1297.1722680366.

The spelling of 2182694561 in words is "two billion, one hundred eighty-two million, six hundred ninety-four thousand, five hundred sixty-one".