55505745 has 24 divisors (see below), whose sum is σ = 101275200. Its totient is φ = 28044576.

The previous prime is 55505719. The next prime is 55505753. The reversal of 55505745 is 54750555.

It is a happy number.

It is not a de Polignac number, because 55505745 - 2¹⁰ = 55504721 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31605 + ... + 33314.

It is an arithmetic number, because the mean of its divisors is an integer number (4219800).

Almost surely, 2^55505745 is an apocalyptic number.

It is an amenable number.

55505745 is a deficient number, since it is larger than the sum of its proper divisors (45769455).

55505745 is a wasteful number, since it uses less digits than its factorization.

55505745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64949 (or 64946 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The square root of 55505745 is about 7450.2177820517. The cubic root of 55505745 is about 381.4573423810.

The spelling of 55505745 in words is "fifty-five million, five hundred five thousand, seven hundred forty-five".