44421011978281 has 9 divisors (see below), whose sum is σ = 45275318130469. Its totient is φ = 43582533101536.

The previous prime is 44421011978243. The next prime is 44421011978293. The reversal of 44421011978281 is 18287911012444.

The square root of 44421011978281 is 6664909.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21574715129881 + 22846296848400 = 4644859^2 + 4779780^2 .

It is not a de Polignac number, because 44421011978281 - 2¹³ = 44421011970089 is a prime.

It is a super-3 number, since 3×44421011978281³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44421011978221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 353177301 + ... + 353303053.

Almost surely, 2^{44421011978281} is an apocalyptic number.

44421011978281 is the 6664909-th square number.

44421011978281 is the 3332455-th centered octagonal number.

It is an amenable number.

44421011978281 is a deficient number, since it is larger than the sum of its proper divisors (854306152188).

44421011978281 is an frugal number, since it uses more digits than its factorization.

44421011978281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251612 (or 125806 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 52.

The spelling of 44421011978281 in words is "forty-four trillion, four hundred twenty-one billion, eleven million, nine hundred seventy-eight thousand, two hundred eighty-one".