55649 has 4 divisors (see below), whose sum is σ = 60720. Its totient is φ = 50580.

The previous prime is 55639. The next prime is 55661. The reversal of 55649 is 94655.

55649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55649 - 2⁴ = 55633 is a prime.

It is a super-3 number, since 3×55649³ = 517003339573347, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (55609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519 + ... + 2540.

It is an arithmetic number, because the mean of its divisors is an integer number (15180).

2⁵⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

55649 is a deficient number, since it is larger than the sum of its proper divisors (5071).

55649 is a wasteful number, since it uses less digits than its factorization.

55649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070.

The product of its digits is 5400, while the sum is 29.

The square root of 55649 is about 235.9004027127. The cubic root of 55649 is about 38.1785228723.

The spelling of 55649 in words is "fifty-five thousand, six hundred forty-nine".