55505646 has 48 divisors (see below), whose sum is σ = 145533024. Its totient is φ = 14925312.

The previous prime is 55505633. The next prime is 55505657. The reversal of 55505646 is 64650555.

It is a happy number.

55505646 is a `hidden beast` number, since 5 + 5 + 5 + 0 + 5 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55505646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10815 + ... + 15098.

It is an arithmetic number, because the mean of its divisors is an integer number (3031938).

Almost surely, 2^55505646 is an apocalyptic number.

55505646 is an abundant number, since it is smaller than the sum of its proper divisors (90027378).

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

55505646 is a wasteful number, since it uses less digits than its factorization.

55505646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25945 (or 25942 counting only the distinct ones).

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

The square root of 55505646 is about 7450.2111379477. The cubic root of 55505646 is about 381.4571155919.

The spelling of 55505646 in words is "fifty-five million, five hundred five thousand, six hundred forty-six".