3421655643556 has 6 divisors (see below), whose sum is σ = 5987897376230. Its totient is φ = 1710827821776.

The previous prime is 3421655643547. The next prime is 3421655643559. The reversal of 3421655643556 is 6553465561243.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2787029913600 + 634625729956 = 1669440^2 + 796634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3421655643497 and 3421655643506.

It is not an unprimeable number, because it can be changed into a prime (3421655643559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427706955441 + ... + 427706955448.

Almost surely, 2^{3421655643556} is an apocalyptic number.

It is an amenable number.

3421655643556 is a deficient number, since it is larger than the sum of its proper divisors (2566241732674).

3421655643556 is a wasteful number, since it uses less digits than its factorization.

3421655643556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855413910893 (or 855413910891 counting only the distinct ones).

The product of its digits is 38880000, while the sum is 55.

The spelling of 3421655643556 in words is "three trillion, four hundred twenty-one billion, six hundred fifty-five million, six hundred forty-three thousand, five hundred fifty-six".