44125780221 has 12 divisors (see below), whose sum is σ = 64089379900. Its totient is φ = 29254659840.

The previous prime is 44125780207. The next prime is 44125780271. The reversal of 44125780221 is 12208752144.

It can be written as a sum of positive squares in 2 ways, for example, as 6787947321 + 37337832900 = 82389^2 + 193230^2 .

It is not a de Polignac number, because 44125780221 - 2²² = 44121585917 is a prime.

It is a super-2 number, since 2×44125780221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44125780271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13542196 + ... + 13545453.

Almost surely, 2^44125780221 is an apocalyptic number.

It is an amenable number.

44125780221 is a deficient number, since it is larger than the sum of its proper divisors (19963599679).

44125780221 is a wasteful number, since it uses less digits than its factorization.

44125780221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27087836 (or 27087833 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 44125780221 in words is "forty-four billion, one hundred twenty-five million, seven hundred eighty thousand, two hundred twenty-one".