1444041681 has 4 divisors (see below), whose sum is σ = 1925388912. Its totient is φ = 962694452.

The previous prime is 1444041679. The next prime is 1444041691. The reversal of 1444041681 is 1861404441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1444041681 - 2¹ = 1444041679 is a prime.

It is a super-2 number, since 2×1444041681² = 4170512752930611522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1444041611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240673611 + ... + 240673616.

It is an arithmetic number, because the mean of its divisors is an integer number (481347228).

Almost surely, 2^1444041681 is an apocalyptic number.

It is an amenable number.

1444041681 is a deficient number, since it is larger than the sum of its proper divisors (481347231).

1444041681 is an equidigital number, since it uses as much as digits as its factorization.

1444041681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481347230.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1444041681 is about 38000.5484302530. The cubic root of 1444041681 is about 1130.2987387249.

The spelling of 1444041681 in words is "one billion, four hundred forty-four million, forty-one thousand, six hundred eighty-one".