55645805 has 8 divisors (see below), whose sum is σ = 66816792. Its totient is φ = 44488768.

The previous prime is 55645801. The next prime is 55645823. The reversal of 55645805 is 50854655.

55645805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22306729 + 33339076 = 4723^2 + 5774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55645805 - 2² = 55645801 is a prime.

It is a super-2 number, since 2×55645805² = 6192911228196050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10139 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (8352099).

Almost surely, 2^55645805 is an apocalyptic number.

It is an amenable number.

55645805 is a deficient number, since it is larger than the sum of its proper divisors (11170987).

55645805 is a wasteful number, since it uses less digits than its factorization.

55645805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975.

The product of its (nonzero) digits is 120000, while the sum is 38.

The square root of 55645805 is about 7459.6115850626. The cubic root of 55645805 is about 381.7779220503. Note that the first 3 decimals are identical.

The spelling of 55645805 in words is "fifty-five million, six hundred forty-five thousand, eight hundred five".