3556621311244 has 6 divisors (see below), whose sum is σ = 6224087294684. Its totient is φ = 1778310655620.

The previous prime is 3556621311239. The next prime is 3556621311247. The reversal of 3556621311244 is 4421131266553.

It is a self number, because there is not a number n which added to its sum of digits gives 3556621311244.

It is not an unprimeable number, because it can be changed into a prime (3556621311247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444577663902 + ... + 444577663909.

Almost surely, 2^{3556621311244} is an apocalyptic number.

It is an amenable number.

3556621311244 is a deficient number, since it is larger than the sum of its proper divisors (2667465983440).

3556621311244 is a wasteful number, since it uses less digits than its factorization.

3556621311244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889155327815 (or 889155327813 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

Adding to 3556621311244 its reverse (4421131266553), we get a palindrome (7977752577797).

The spelling of 3556621311244 in words is "three trillion, five hundred fifty-six billion, six hundred twenty-one million, three hundred eleven thousand, two hundred forty-four".