44105257721 has 8 divisors (see below), whose sum is σ = 50412479040. Its totient is φ = 37799653968.

The previous prime is 44105257711. The next prime is 44105257771. The reversal of 44105257721 is 12775250144.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44105257721 is a prime.

It is a super-2 number, since 2×44105257721² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44105257711) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 345386 + ... + 455523.

It is an arithmetic number, because the mean of its divisors is an integer number (6301559880).

Almost surely, 2^44105257721 is an apocalyptic number.

It is an amenable number.

44105257721 is a deficient number, since it is larger than the sum of its proper divisors (6307221319).

44105257721 is an equidigital number, since it uses as much as digits as its factorization.

44105257721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808783.

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 44105257721 in words is "forty-four billion, one hundred five million, two hundred fifty-seven thousand, seven hundred twenty-one".