3505550561 has 2 divisors, whose sum is σ = 3505550562. Its totient is φ = 3505550560.

The previous prime is 3505550551. The next prime is 3505550639. The reversal of 3505550561 is 1650555053.

3505550561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3412312225 + 93238336 = 58415^2 + 9656^2 .

It is a cyclic number.

It is not a de Polignac number, because 3505550561 - 2²⁶ = 3438441697 is a prime.

It is not a weakly prime, because it can be changed into another prime (3505550551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1752775280 + 1752775281.

It is an arithmetic number, because the mean of its divisors is an integer number (1752775281).

Almost surely, 2^3505550561 is an apocalyptic number.

It is an amenable number.

3505550561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3505550561 is an equidigital number, since it uses as much as digits as its factorization.

3505550561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 35.

The square root of 3505550561 is about 59207.6900495197. The cubic root of 3505550561 is about 1519.0966702383.

The spelling of 3505550561 in words is "three billion, five hundred five million, five hundred fifty thousand, five hundred sixty-one".