144664261889 has 4 divisors (see below), whose sum is σ = 165330585024. Its totient is φ = 123997938756.

The previous prime is 144664261877. The next prime is 144664261901. The reversal of 144664261889 is 988162466441.

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 an interprime number because it is at equal distance from previous prime (144664261877) and next prime (144664261901).

It is a cyclic number.

It is not a de Polignac number, because 144664261889 - 2²⁸ = 144395826433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144664261589) 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 3 ways as a sum of consecutive naturals, for example, 10333161557 + ... + 10333161570.

It is an arithmetic number, because the mean of its divisors is an integer number (41332646256).

Almost surely, 2^144664261889 is an apocalyptic number.

It is an amenable number.

144664261889 is a deficient number, since it is larger than the sum of its proper divisors (20666323135).

144664261889 is an equidigital number, since it uses as much as digits as its factorization.

144664261889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20666323134.

The product of its digits is 15925248, while the sum is 59.

The spelling of 144664261889 in words is "one hundred forty-four billion, six hundred sixty-four million, two hundred sixty-one thousand, eight hundred eighty-nine".