3561553310721 has 16 divisors (see below), whose sum is σ = 5455248699264. Its totient is φ = 2024628378624.

The previous prime is 3561553310687. The next prime is 3561553310729. The reversal of 3561553310721 is 1270133551653.

3561553310721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3561553310721 - 2¹⁸ = 3561553048577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3561553310729) 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, 439368426 + ... + 439376531.

It is an arithmetic number, because the mean of its divisors is an integer number (340953043704).

Almost surely, 2^{3561553310721} is an apocalyptic number.

It is an amenable number.

3561553310721 is a deficient number, since it is larger than the sum of its proper divisors (1893695388543).

3561553310721 is a wasteful number, since it uses less digits than its factorization.

3561553310721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878745160.

The product of its (nonzero) digits is 283500, while the sum is 42.

The spelling of 3561553310721 in words is "three trillion, five hundred sixty-one billion, five hundred fifty-three million, three hundred ten thousand, seven hundred twenty-one".