44597356821 has 6 divisors (see below), whose sum is σ = 64418404310. Its totient is φ = 29731571208.

The previous prime is 44597356813. The next prime is 44597356823. The reversal of 44597356821 is 12865379544.

It is a happy number.

44597356821 is a `hidden beast` number, since 4 + 4 + 5 + 9 + 73 + 568 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39665103921 + 4932252900 = 199161^2 + 70230^2 .

It is not a de Polignac number, because 44597356821 - 2³ = 44597356813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44597356823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2477630926 + ... + 2477630943.

Almost surely, 2^44597356821 is an apocalyptic number.

It is an amenable number.

44597356821 is a deficient number, since it is larger than the sum of its proper divisors (19821047489).

44597356821 is a wasteful number, since it uses less digits than its factorization.

44597356821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955261875 (or 4955261872 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 44597356821 in words is "forty-four billion, five hundred ninety-seven million, three hundred fifty-six thousand, eight hundred twenty-one".