55644320681443 has 4 divisors (see below), whose sum is σ = 59924653041568. Its totient is φ = 51363988321320.

The previous prime is 55644320681437. The next prime is 55644320681471. The reversal of 55644320681443 is 34418602344655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55644320681443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55644320681743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140166180043 + ... + 2140166180068.

It is an arithmetic number, because the mean of its divisors is an integer number (14981163260392).

Almost surely, 2^{55644320681443} is an apocalyptic number.

55644320681443 is a deficient number, since it is larger than the sum of its proper divisors (4280332360125).

55644320681443 is a wasteful number, since it uses less digits than its factorization.

55644320681443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280332360124.

The product of its (nonzero) digits is 33177600, while the sum is 55.

The spelling of 55644320681443 in words is "fifty-five trillion, six hundred forty-four billion, three hundred twenty million, six hundred eighty-one thousand, four hundred forty-three".