55555243405 has 16 divisors (see below), whose sum is σ = 69628573440. Its totient is φ = 42510059712.

The previous prime is 55555243399. The next prime is 55555243451. The reversal of 55555243405 is 50434255555.

It is a cyclic number.

It is not a de Polignac number, because 55555243405 - 2¹⁹ = 55554719117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2533989 + ... + 2555818.

It is an arithmetic number, because the mean of its divisors is an integer number (4351785840).

Almost surely, 2^55555243405 is an apocalyptic number.

It is an amenable number.

55555243405 is a deficient number, since it is larger than the sum of its proper divisors (14073330035).

55555243405 is a wasteful number, since it uses less digits than its factorization.

55555243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089908.

The product of its (nonzero) digits is 1500000, while the sum is 43.

The spelling of 55555243405 in words is "fifty-five billion, five hundred fifty-five million, two hundred forty-three thousand, four hundred five".