55644447 has 8 divisors (see below), whose sum is σ = 74300080. Its totient is φ = 37042560.

The previous prime is 55644443. The next prime is 55644461. The reversal of 55644447 is 74444655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55644447 - 2² = 55644443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55644443) 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, 10954 + ... + 15207.

It is an arithmetic number, because the mean of its divisors is an integer number (9287510).

Almost surely, 2^55644447 is an apocalyptic number.

55644447 is a deficient number, since it is larger than the sum of its proper divisors (18655633).

55644447 is a wasteful number, since it uses less digits than its factorization.

55644447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26873.

The product of its digits is 268800, while the sum is 39.

The square root of 55644447 is about 7459.5205610012. The cubic root of 55644447 is about 381.7748163437.

It can be divided in two parts, 5564 and 4447, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 55644447 in words is "fifty-five million, six hundred forty-four thousand, four hundred forty-seven".