1444201661 has 8 divisors (see below), whose sum is σ = 1651353024. Its totient is φ = 1237259520.

The previous prime is 1444201637. The next prime is 1444201673. The reversal of 1444201661 is 1661024441.

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

It is not a de Polignac number, because 1444201661 - 2¹⁴ = 1444185277 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 (1444201631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37220 + ... + 65373.

It is an arithmetic number, because the mean of its divisors is an integer number (206419128).

Almost surely, 2^1444201661 is an apocalyptic number.

It is an amenable number.

1444201661 is a deficient number, since it is larger than the sum of its proper divisors (207151363).

1444201661 is a wasteful number, since it uses less digits than its factorization.

1444201661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104611.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1444201661 is about 38002.6533415760. The cubic root of 1444201661 is about 1130.3404777128.

The spelling of 1444201661 in words is "one billion, four hundred forty-four million, two hundred one thousand, six hundred sixty-one".