3563256561 has 16 divisors (see below), whose sum is σ = 5085830400. Its totient is φ = 2212332048.

The previous prime is 3563256539. The next prime is 3563256581. The reversal of 3563256561 is 1656523653.

It is not a de Polignac number, because 3563256561 - 2²² = 3559062257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3563256581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526411 + ... + 533136.

It is an arithmetic number, because the mean of its divisors is an integer number (317864400).

Almost surely, 2^3563256561 is an apocalyptic number.

It is an amenable number.

3563256561 is a deficient number, since it is larger than the sum of its proper divisors (1522573839).

3563256561 is a wasteful number, since it uses less digits than its factorization.

3563256561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059628.

The product of its digits is 486000, while the sum is 42.

The square root of 3563256561 is about 59693.0193657516. The cubic root of 3563256561 is about 1527.3867934599.

The spelling of 3563256561 in words is "three billion, five hundred sixty-three million, two hundred fifty-six thousand, five hundred sixty-one".