55643444 has 12 divisors (see below), whose sum is σ = 97881924. Its totient is φ = 27677184.

The previous prime is 55643387. The next prime is 55643453. The reversal of 55643444 is 44434655.

It can be written as a sum of positive squares in 2 ways, for example, as 7507600 + 48135844 = 2740^2 + 6938^2 .

It is a super-2 number, since 2×55643444² = 6192385720362272, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 35267 + ... + 36810.

It is an arithmetic number, because the mean of its divisors is an integer number (8156827).

Almost surely, 2^55643444 is an apocalyptic number.

It is an amenable number.

55643444 is a deficient number, since it is larger than the sum of its proper divisors (42238480).

55643444 is a wasteful number, since it uses less digits than its factorization.

55643444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72274 (or 72272 counting only the distinct ones).

The product of its digits is 115200, while the sum is 35.

The square root of 55643444 is about 7459.4533311765. The cubic root of 55643444 is about 381.7725224793.

The spelling of 55643444 in words is "fifty-five million, six hundred forty-three thousand, four hundred forty-four".