1810644061 has 2 divisors, whose sum is σ = 1810644062. Its totient is φ = 1810644060.

The previous prime is 1810644023. The next prime is 1810644067. The reversal of 1810644061 is 1604460181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1686744900 + 123899161 = 41070^2 + 11131^2 .

It is a cyclic number.

It is not a de Polignac number, because 1810644061 - 2¹¹ = 1810642013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1810644067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905322030 + 905322031.

It is an arithmetic number, because the mean of its divisors is an integer number (905322031).

Almost surely, 2^1810644061 is an apocalyptic number.

It is an amenable number.

1810644061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1810644061 is an equidigital number, since it uses as much as digits as its factorization.

1810644061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1810644061 is about 42551.6634339952. The cubic root of 1810644061 is about 1218.8334412439.

The spelling of 1810644061 in words is "one billion, eight hundred ten million, six hundred forty-four thousand, sixty-one".