5661551610556 has 6 divisors (see below), whose sum is σ = 9907715318480. Its totient is φ = 2830775805276.

The previous prime is 5661551610511. The next prime is 5661551610571. The reversal of 5661551610556 is 6550161551665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707693951316 + ... + 707693951323.

Almost surely, 2^{5661551610556} is an apocalyptic number.

It is an amenable number.

5661551610556 is a deficient number, since it is larger than the sum of its proper divisors (4246163707924).

5661551610556 is a wasteful number, since it uses less digits than its factorization.

5661551610556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415387902643 (or 1415387902641 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 5661551610556 in words is "five trillion, six hundred sixty-one billion, five hundred fifty-one million, six hundred ten thousand, five hundred fifty-six".