44136321165 has 48 divisors (see below), whose sum is σ = 78638180400. Its totient is φ = 22883475456.

The previous prime is 44136321157. The next prime is 44136321209. The reversal of 44136321165 is 56112363144.

44136321165 is a `hidden beast` number, since 4 + 4 + 1 + 3 + 632 + 1 + 16 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1437471396 + 42698849769 = 37914^2 + 206637^2 .

It is not a de Polignac number, because 44136321165 - 2³ = 44136321157 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2035501 + ... + 2057069.

It is an arithmetic number, because the mean of its divisors is an integer number (1638295425).

Almost surely, 2^44136321165 is an apocalyptic number.

44136321165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44136321165 is a deficient number, since it is larger than the sum of its proper divisors (34501859235).

44136321165 is a wasteful number, since it uses less digits than its factorization.

44136321165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22846 (or 22843 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 44136321165 in words is "forty-four billion, one hundred thirty-six million, three hundred twenty-one thousand, one hundred sixty-five".