55455565 has 32 divisors (see below), whose sum is σ = 74908800. Its totient is φ = 39072000.

The previous prime is 55455557. The next prime is 55455583. The reversal of 55455565 is 56555455.

It is not a de Polignac number, because 55455565 - 2³ = 55455557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372111 + ... + 372259.

It is an arithmetic number, because the mean of its divisors is an integer number (2340900).

Almost surely, 2^55455565 is an apocalyptic number.

55455565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55455565 is a deficient number, since it is larger than the sum of its proper divisors (19453235).

55455565 is a wasteful number, since it uses less digits than its factorization.

55455565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its digits is 375000, while the sum is 40.

The square root of 55455565 is about 7446.8493337787. The cubic root of 55455565 is about 381.3423554811.

The spelling of 55455565 in words is "fifty-five million, four hundred fifty-five thousand, five hundred sixty-five".