7555444445556 has 72 divisors (see below), whose sum is σ = 21833690540480. Its totient is φ = 2158020838656.

The previous prime is 7555444445539. The next prime is 7555444445623. The reversal of 7555444445556 is 6555444445557.

7555444445556 is a `hidden beast` number, since 7 + 5 + 5 + 544 + 44 + 45 + 5 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 7555444445493 and 7555444445502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3900661 + ... + 5506908.

Almost surely, 2^{7555444445556} is an apocalyptic number.

It is an amenable number.

7555444445556 is an abundant number, since it is smaller than the sum of its proper divisors (14278246094924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7555444445556 is a wasteful number, since it uses less digits than its factorization.

7555444445556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9410773 (or 9410768 counting only the distinct ones).

The product of its digits is 672000000, while the sum is 63.

Subtracting from 7555444445556 its reverse (6555444445557), we obtain a palindrome (999999999999).

The spelling of 7555444445556 in words is "seven trillion, five hundred fifty-five billion, four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-six".