55644570 has 112 divisors (see below), whose sum is σ = 159359400. Its totient is φ = 13934592.

The previous prime is 55644551. The next prime is 55644583. The reversal of 55644570 is 7544655.

It is a happy number.

55644570 is a `hidden beast` number, since 5 + 5 + 644 + 5 + 7 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 51969681 + 3674889 = 7209^2 + 1917^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 123706 + ... + 124154.

Almost surely, 2^55644570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55644570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79679700).

55644570 is an abundant number, since it is smaller than the sum of its proper divisors (103714830).

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

55644570 is a wasteful number, since it uses less digits than its factorization.

55644570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 55644570 is about 7459.5288054944. The cubic root of 55644570 is about 381.7750976432.

The spelling of 55644570 in words is "fifty-five million, six hundred forty-four thousand, five hundred seventy".