3601723661 has 2 divisors, whose sum is σ = 3601723662. Its totient is φ = 3601723660.

The previous prime is 3601723639. The next prime is 3601723739. The reversal of 3601723661 is 1663271063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591604900 + 10118761 = 59930^2 + 3181^2 .

It is a cyclic number.

It is not a de Polignac number, because 3601723661 - 2¹⁰ = 3601722637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3601723861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1800861830 + 1800861831.

It is an arithmetic number, because the mean of its divisors is an integer number (1800861831).

Almost surely, 2^3601723661 is an apocalyptic number.

It is an amenable number.

3601723661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3601723661 is an equidigital number, since it uses as much as digits as its factorization.

3601723661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 3601723661 is about 60014.3621227453. The cubic root of 3601723661 is about 1532.8634290338.

The spelling of 3601723661 in words is "three billion, six hundred one million, seven hundred twenty-three thousand, six hundred sixty-one".