55609180 has 48 divisors (see below), whose sum is σ = 128509920. Its totient is φ = 20211840.

The previous prime is 55609171. The next prime is 55609189. The reversal of 55609180 is 8190655.

It is an interprime number because it is at equal distance from previous prime (55609171) and next prime (55609189).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55609189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25576 + ... + 27664.

It is an arithmetic number, because the mean of its divisors is an integer number (2677290).

Almost surely, 2^55609180 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55609180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64254960).

55609180 is an abundant number, since it is smaller than the sum of its proper divisors (72900740).

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

55609180 is a wasteful number, since it uses less digits than its factorization.

55609180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 55609180 is about 7457.1562944597. The cubic root of 55609180 is about 381.6941440356.

The spelling of 55609180 in words is "fifty-five million, six hundred nine thousand, one hundred eighty".