6555444445557 has 48 divisors (see below), whose sum is σ = 10835553768832. Its totient is φ = 3741171079680.

The previous prime is 6555444445541. The next prime is 6555444445573. The reversal of 6555444445557 is 7555444445556.

6555444445557 is a `hidden beast` number, since 6 + 5 + 5 + 544 + 44 + 45 + 5 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (6555444445541) and next prime (6555444445573).

It is not a de Polignac number, because 6555444445557 - 2⁴ = 6555444445541 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6555444445494 and 6555444445503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555444445657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159802113 + ... + 159843129.

Almost surely, 2^{6555444445557} is an apocalyptic number.

It is an amenable number.

6555444445557 is a deficient number, since it is larger than the sum of its proper divisors (4280109323275).

6555444445557 is a wasteful number, since it uses less digits than its factorization.

6555444445557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44218 (or 44215 counting only the distinct ones).

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

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

The spelling of 6555444445557 in words is "six trillion, five hundred fifty-five billion, four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-seven".