55573686 has 96 divisors (see below), whose sum is σ = 145117440. Its totient is φ = 15035328.

The previous prime is 55573633. The next prime is 55573691. The reversal of 55573686 is 68637555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 244705 + ... + 244931.

It is an arithmetic number, because the mean of its divisors is an integer number (1511640).

Almost surely, 2^55573686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55573686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72558720).

55573686 is an abundant number, since it is smaller than the sum of its proper divisors (89543754).

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

55573686 is a wasteful number, since it uses less digits than its factorization.

55573686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 335 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 55573686 is about 7454.7760529744. The cubic root of 55573686 is about 381.6129180258.

The spelling of 55573686 in words is "fifty-five million, five hundred seventy-three thousand, six hundred eighty-six".