54644387730641 has 4 divisors (see below), whose sum is σ = 55675413914292. Its totient is φ = 53613361546992.

The previous prime is 54644387730623. The next prime is 54644387730703. The reversal of 54644387730641 is 14603778344645.

54644387730641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14489404185025 + 40154983545616 = 3806495^2 + 6336796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54644387730641 is a prime.

It is a super-2 number, since 2×54644387730641² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54644387730601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515513091746 + ... + 515513091851.

It is an arithmetic number, because the mean of its divisors is an integer number (13918853478573).

Almost surely, 2^{54644387730641} is an apocalyptic number.

It is an amenable number.

54644387730641 is a deficient number, since it is larger than the sum of its proper divisors (1031026183651).

54644387730641 is a wasteful number, since it uses less digits than its factorization.

54644387730641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031026183650.

The product of its (nonzero) digits is 162570240, while the sum is 62.

The spelling of 54644387730641 in words is "fifty-four trillion, six hundred forty-four billion, three hundred eighty-seven million, seven hundred thirty thousand, six hundred forty-one".