44164728549 has 8 divisors (see below), whose sum is σ = 65429227520. Its totient is φ = 29443152348.

The previous prime is 44164728527. The next prime is 44164728571. The reversal of 44164728549 is 94582746144.

44164728549 is a `hidden beast` number, since 44 + 16 + 47 + 2 + 8 + 549 = 666.

It is an interprime number because it is at equal distance from previous prime (44164728527) and next prime (44164728571).

It is a de Polignac number, because none of the positive numbers 2^k-44164728549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44164728495 and 44164728504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44164728449) 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, 817865317 + ... + 817865370.

It is an arithmetic number, because the mean of its divisors is an integer number (8178653440).

Almost surely, 2^44164728549 is an apocalyptic number.

It is an amenable number.

44164728549 is a deficient number, since it is larger than the sum of its proper divisors (21264498971).

44164728549 is a wasteful number, since it uses less digits than its factorization.

44164728549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635730696 (or 1635730690 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 44164728549 in words is "forty-four billion, one hundred sixty-four million, seven hundred twenty-eight thousand, five hundred forty-nine".