2310561661 has 2 divisors, whose sum is σ = 2310561662. Its totient is φ = 2310561660.

The previous prime is 2310561637. The next prime is 2310561667. The reversal of 2310561661 is 1661650132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1291036761 + 1019524900 = 35931^2 + 31930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2310561661 - 2²³ = 2302173053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2310561667) 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, 1155280830 + 1155280831.

It is an arithmetic number, because the mean of its divisors is an integer number (1155280831).

Almost surely, 2^2310561661 is an apocalyptic number.

It is an amenable number.

2310561661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2310561661 is an equidigital number, since it uses as much as digits as its factorization.

2310561661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2310561661 is about 48068.3020399098. The cubic root of 2310561661 is about 1322.0235379704.

The spelling of 2310561661 in words is "two billion, three hundred ten million, five hundred sixty-one thousand, six hundred sixty-one".