144638545865 has 16 divisors (see below), whose sum is σ = 189412045056. Its totient is φ = 105154425600.

The previous prime is 144638545841. The next prime is 144638545871. The reversal of 144638545865 is 568545836441.

It is not a de Polignac number, because 144638545865 - 2⁸ = 144638545609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 308321 + ... + 619950.

It is an arithmetic number, because the mean of its divisors is an integer number (11838252816).

Almost surely, 2^144638545865 is an apocalyptic number.

It is an amenable number.

144638545865 is a deficient number, since it is larger than the sum of its proper divisors (44773499191).

144638545865 is a wasteful number, since it uses less digits than its factorization.

144638545865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931120.

The product of its digits is 55296000, while the sum is 59.

The spelling of 144638545865 in words is "one hundred forty-four billion, six hundred thirty-eight million, five hundred forty-five thousand, eight hundred sixty-five".