3561323340641 has 24 divisors (see below), whose sum is σ = 4172369488992. Its totient is φ = 3004203574400.

The previous prime is 3561323340587. The next prime is 3561323340661. The reversal of 3561323340641 is 1460433231653.

It is not a de Polignac number, because 3561323340641 - 2²⁶ = 3561256231777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561323340661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 946295 + ... + 2831628.

It is an arithmetic number, because the mean of its divisors is an integer number (173848728708).

Almost surely, 2^{3561323340641} is an apocalyptic number.

It is an amenable number.

3561323340641 is a deficient number, since it is larger than the sum of its proper divisors (611046148351).

3561323340641 is a wasteful number, since it uses less digits than its factorization.

3561323340641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778093 (or 3778022 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 3561323340641 in words is "three trillion, five hundred sixty-one billion, three hundred twenty-three million, three hundred forty thousand, six hundred forty-one".