544656643 has 4 divisors (see below), whose sum is σ = 549747000. Its totient is φ = 539566288.

The previous prime is 544656631. The next prime is 544656647. The reversal of 544656643 is 346656445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346656445 = 5 ⋅69331289.

It is a cyclic number.

It is not a de Polignac number, because 544656643 - 2²⁵ = 511102211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 544656643.

It is not an unprimeable number, because it can be changed into a prime (544656647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2545018 + ... + 2545231.

It is an arithmetic number, because the mean of its divisors is an integer number (137436750).

Almost surely, 2^544656643 is an apocalyptic number.

544656643 is a deficient number, since it is larger than the sum of its proper divisors (5090357).

544656643 is a wasteful number, since it uses less digits than its factorization.

544656643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090356.

The product of its digits is 1036800, while the sum is 43.

The square root of 544656643 is about 23337.8800022624. The cubic root of 544656643 is about 816.6593430043.

The spelling of 544656643 in words is "five hundred forty-four million, six hundred fifty-six thousand, six hundred forty-three".