6555444445555 has 4 divisors (see below), whose sum is σ = 7866533334672. Its totient is φ = 5244355556440.

The previous prime is 6555444445541. The next prime is 6555444445573. The reversal of 6555444445555 is 5555444445556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6555444445555 - 2²³ = 6555436056947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6555444445493 and 6555444445502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655544444551 + ... + 655544444560.

It is an arithmetic number, because the mean of its divisors is an integer number (1966633333668).

Almost surely, 2^{6555444445555} is an apocalyptic number.

6555444445555 is a deficient number, since it is larger than the sum of its proper divisors (1311088889117).

6555444445555 is a wasteful number, since it uses less digits than its factorization.

6555444445555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311088889116.

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

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

The spelling of 6555444445555 in words is "six trillion, five hundred fifty-five billion, four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-five".