144640813579 has 4 divisors (see below), whose sum is σ = 144917373976. Its totient is φ = 144364253184.

The previous prime is 144640813481. The next prime is 144640813613. The reversal of 144640813579 is 975318046441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144640813579 - 2⁹ = 144640813067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144640813879) 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, 138279414 + ... + 138280459.

It is an arithmetic number, because the mean of its divisors is an integer number (36229343494).

Almost surely, 2^144640813579 is an apocalyptic number.

144640813579 is a deficient number, since it is larger than the sum of its proper divisors (276560397).

144640813579 is an equidigital number, since it uses as much as digits as its factorization.

144640813579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276560396.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 144640813579 in words is "one hundred forty-four billion, six hundred forty million, eight hundred thirteen thousand, five hundred seventy-nine".