3609061505261 has 2 divisors, whose sum is σ = 3609061505262. Its totient is φ = 3609061505260.

The previous prime is 3609061505219. The next prime is 3609061505281. The reversal of 3609061505261 is 1625051609063.

3609061505261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3564374082025 + 44687423236 = 1887955^2 + 211394^2 .

It is an emirp because it is prime and its reverse (1625051609063) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3609061505261 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 (3609061505281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804530752630 + 1804530752631.

It is an arithmetic number, because the mean of its divisors is an integer number (1804530752631).

Almost surely, 2^{3609061505261} is an apocalyptic number.

It is an amenable number.

3609061505261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3609061505261 is an equidigital number, since it uses as much as digits as its factorization.

3609061505261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 3609061505261 in words is "three trillion, six hundred nine billion, sixty-one million, five hundred five thousand, two hundred sixty-one".