3561131280344 has 32 divisors (see below), whose sum is σ = 7287475435200. Its totient is φ = 1617953087520.

The previous prime is 3561131280263. The next prime is 3561131280359. The reversal of 3561131280344 is 4430821311653.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9094022 + ... + 9477525.

It is an arithmetic number, because the mean of its divisors is an integer number (227733607350).

Almost surely, 2^{3561131280344} is an apocalyptic number.

It is an amenable number.

3561131280344 is an abundant number, since it is smaller than the sum of its proper divisors (3726344154856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3561131280344 is a wasteful number, since it uses less digits than its factorization.

3561131280344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18573743 (or 18573739 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

Adding to 3561131280344 its reverse (4430821311653), we get a palindrome (7991952591997).

The spelling of 3561131280344 in words is "three trillion, five hundred sixty-one billion, one hundred thirty-one million, two hundred eighty thousand, three hundred forty-four".