3561365261 has 2 divisors, whose sum is σ = 3561365262. Its totient is φ = 3561365260.

The previous prime is 3561365251. The next prime is 3561365273. The reversal of 3561365261 is 1625631653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3366204361 + 195160900 = 58019^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561365261 - 2¹⁴ = 3561348877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3561365251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780682630 + 1780682631.

It is an arithmetic number, because the mean of its divisors is an integer number (1780682631).

Almost surely, 2^3561365261 is an apocalyptic number.

It is an amenable number.

3561365261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561365261 is an equidigital number, since it uses as much as digits as its factorization.

3561365261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The square root of 3561365261 is about 59677.1753771909. The cubic root of 3561365261 is about 1527.1165109399.

The spelling of 3561365261 in words is "three billion, five hundred sixty-one million, three hundred sixty-five thousand, two hundred sixty-one".