5555444445556 has 24 divisors (see below), whose sum is σ = 10260715388000. Its totient is φ = 2624582961504.

The previous prime is 5555444445493. The next prime is 5555444445557. The reversal of 5555444445556 is 6555444445555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 5555444445494 and 5555444445503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555444445557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96406491 + ... + 96464098.

Almost surely, 2^{5555444445556} is an apocalyptic number.

It is an amenable number.

5555444445556 is a deficient number, since it is larger than the sum of its proper divisors (4705270942444).

5555444445556 is a wasteful number, since it uses less digits than its factorization.

5555444445556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192870991 (or 192870989 counting only the distinct ones).

The product of its digits is 480000000, while the sum is 61.

Subtracting 5555444445556 from its reverse (6555444445555), we obtain a palindrome (999999999999).

The spelling of 5555444445556 in words is "five trillion, five hundred fifty-five billion, four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-six".