3561281663 has 8 divisors (see below), whose sum is σ = 3756240000. Its totient is φ = 3367075608.

The previous prime is 3561281651. The next prime is 3561281683. The reversal of 3561281663 is 3661821653.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3561281663 - 2⁶ = 3561281599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3561281663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561281683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178331 + ... + 197292.

It is an arithmetic number, because the mean of its divisors is an integer number (469530000).

Almost surely, 2^3561281663 is an apocalyptic number.

3561281663 is a deficient number, since it is larger than the sum of its proper divisors (194958337).

3561281663 is a wasteful number, since it uses less digits than its factorization.

3561281663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376141.

The product of its digits is 155520, while the sum is 41.

The square root of 3561281663 is about 59676.4749545413. The cubic root of 3561281663 is about 1527.1045618815.

The spelling of 3561281663 in words is "three billion, five hundred sixty-one million, two hundred eighty-one thousand, six hundred sixty-three".