55558656 has 80 divisors (see below), whose sum is σ = 164498400. Its totient is φ = 18514944.

The previous prime is 55558651. The next prime is 55558661. The reversal of 55558656 is 65685555.

It is an interprime number because it is at equal distance from previous prime (55558651) and next prime (55558661).

It is not an unprimeable number, because it can be changed into a prime (55558651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11815 + ... + 15833.

It is an arithmetic number, because the mean of its divisors is an integer number (2056230).

Almost surely, 2^55558656 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 55558656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82249200).

55558656 is an abundant number, since it is smaller than the sum of its proper divisors (108939744).

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

55558656 is an equidigital number, since it uses as much as digits as its factorization.

55558656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4024 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The square root of 55558656 is about 7453.7679062337. The cubic root of 55558656 is about 381.5785122982.

The spelling of 55558656 in words is "fifty-five million, five hundred fifty-eight thousand, six hundred fifty-six".