55649871 has 24 divisors (see below), whose sum is σ = 82701216. Its totient is φ = 36046080.

The previous prime is 55649863. The next prime is 55649897. The reversal of 55649871 is 17894655.

55649871 is a `hidden beast` number, since 5 + 564 + 9 + 87 + 1 = 666.

55649871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55649871 - 2³ = 55649863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55649171) 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 23 ways as a sum of consecutive naturals, for example, 46051 + ... + 47243.

It is an arithmetic number, because the mean of its divisors is an integer number (3445884).

Almost surely, 2^55649871 is an apocalyptic number.

55649871 is a deficient number, since it is larger than the sum of its proper divisors (27051345).

55649871 is a wasteful number, since it uses less digits than its factorization.

55649871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1340 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 55649871 is about 7459.8841143814. The cubic root of 55649871 is about 381.7872205723.

The spelling of 55649871 in words is "fifty-five million, six hundred forty-nine thousand, eight hundred seventy-one".