55555484447 has 2 divisors, whose sum is σ = 55555484448. Its totient is φ = 55555484446.

The previous prime is 55555484417. The next prime is 55555484449. The reversal of 55555484447 is 74448455555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55555484447 - 2²⁸ = 55287048991 is a prime.

Together with 55555484449, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55555484392 and 55555484401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555484449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777742223 + 27777742224.

It is an arithmetic number, because the mean of its divisors is an integer number (27777742224).

Almost surely, 2^55555484447 is an apocalyptic number.

55555484447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555484447 is an equidigital number, since it uses as much as digits as its factorization.

55555484447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800000, while the sum is 56.

The spelling of 55555484447 in words is "fifty-five billion, five hundred fifty-five million, four hundred eighty-four thousand, four hundred forty-seven".