55644745 has 8 divisors (see below), whose sum is σ = 71910216. Its totient is φ = 41091456.

The previous prime is 55644733. The next prime is 55644763. The reversal of 55644745 is 54744655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 484416 + 55160329 = 696^2 + 7427^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55644745 - 2⁵ = 55644713 is a prime.

It is a super-2 number, since 2×55644745² = 6192675292230050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55644698 and 55644707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427972 + ... + 428101.

It is an arithmetic number, because the mean of its divisors is an integer number (8988777).

Almost surely, 2^55644745 is an apocalyptic number.

It is an amenable number.

55644745 is a deficient number, since it is larger than the sum of its proper divisors (16265471).

55644745 is a wasteful number, since it uses less digits than its factorization.

55644745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856091.

The product of its digits is 336000, while the sum is 40.

The square root of 55644745 is about 7459.5405354485. The cubic root of 55644745 is about 381.7754978654.

The spelling of 55644745 in words is "fifty-five million, six hundred forty-four thousand, seven hundred forty-five".