44855611821 has 48 divisors (see below), whose sum is σ = 67310910576. Its totient is φ = 28760997888.

The previous prime is 44855611807. The next prime is 44855611841. The reversal of 44855611821 is 12811655844.

44855611821 is a `hidden beast` number, since 4 + 4 + 8 + 5 + 5 + 611 + 8 + 21 = 666.

44855611821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 170302500 + 44685309321 = 13050^2 + 211389^2 .

It is not a de Polignac number, because 44855611821 - 2¹⁷ = 44855480749 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44855611841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16291981 + ... + 16294733.

It is an arithmetic number, because the mean of its divisors is an integer number (1402310637).

Almost surely, 2^44855611821 is an apocalyptic number.

It is an amenable number.

44855611821 is a deficient number, since it is larger than the sum of its proper divisors (22455298755).

44855611821 is a wasteful number, since it uses less digits than its factorization.

44855611821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342 (or 3339 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The spelling of 44855611821 in words is "forty-four billion, eight hundred fifty-five million, six hundred eleven thousand, eight hundred twenty-one".