55555445 has 32 divisors (see below), whose sum is σ = 76602240. Its totient is φ = 38304000.

The previous prime is 55555429. The next prime is 55555459. The reversal of 55555445 is 54455555.

It is not a de Polignac number, because 55555445 - 2⁴ = 55555429 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 55555399 and 55555408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97010 + ... + 97580.

It is an arithmetic number, because the mean of its divisors is an integer number (2393820).

Almost surely, 2^55555445 is an apocalyptic number.

55555445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55555445 is a deficient number, since it is larger than the sum of its proper divisors (21046795).

55555445 is a wasteful number, since it uses less digits than its factorization.

55555445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its digits is 250000, while the sum is 38.

The square root of 55555445 is about 7453.5525087035. The cubic root of 55555445 is about 381.5711610752.

The spelling of 55555445 in words is "fifty-five million, five hundred fifty-five thousand, four hundred forty-five".