55505645 has 8 divisors (see below), whose sum is σ = 71730456. Its totient is φ = 40988736.

The previous prime is 55505633. The next prime is 55505657. The reversal of 55505645 is 54650555.

It is an interprime number because it is at equal distance from previous prime (55505633) and next prime (55505657).

It can be written as a sum of positive squares in 4 ways, for example, as 1247689 + 54257956 = 1117^2 + 7366^2 .

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 55505645 - 2⁶ = 55505581 is a prime.

It is a super-3 number, since 3×55505645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 426902 + ... + 427031.

It is an arithmetic number, because the mean of its divisors is an integer number (8966307).

Almost surely, 2^55505645 is an apocalyptic number.

It is an amenable number.

55505645 is a deficient number, since it is larger than the sum of its proper divisors (16224811).

55505645 is a wasteful number, since it uses less digits than its factorization.

55505645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853951.

The product of its (nonzero) digits is 75000, while the sum is 35.

The square root of 55505645 is about 7450.2110708355. The cubic root of 55505645 is about 381.4571133011.

The spelling of 55505645 in words is "fifty-five million, five hundred five thousand, six hundred forty-five".