55648660 has 24 divisors (see below), whose sum is σ = 117068616. Its totient is φ = 22220160.

The previous prime is 55648657. The next prime is 55648673. The reversal of 55648660 is 6684655.

It can be written as a sum of positive squares in 4 ways, for example, as 11930116 + 43718544 = 3454^2 + 6612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10930 + ... + 15190.

It is an arithmetic number, because the mean of its divisors is an integer number (4877859).

Almost surely, 2^55648660 is an apocalyptic number.

It is an amenable number.

55648660 is an abundant number, since it is smaller than the sum of its proper divisors (61419956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55648660 is a wasteful number, since it uses less digits than its factorization.

55648660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923 (or 4921 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 55648660 is about 7459.8029464591. The cubic root of 55648660 is about 381.7844511878.

The spelling of 55648660 in words is "fifty-five million, six hundred forty-eight thousand, six hundred sixty".