55556604 has 72 divisors (see below), whose sum is σ = 148181488. Its totient is φ = 18195840.

The previous prime is 55556597. The next prime is 55556617. The reversal of 55556604 is 40665555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58824 + ... + 59760.

Almost surely, 2^55556604 is an apocalyptic number.

55556604 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55556604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74090744).

55556604 is an abundant number, since it is smaller than the sum of its proper divisors (92624884).

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

55556604 is a wasteful number, since it uses less digits than its factorization.

55556604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 55556604 is about 7453.6302564589. The cubic root of 55556604 is about 381.5738145079.

The spelling of 55556604 in words is "fifty-five million, five hundred fifty-six thousand, six hundred four".