144849968639 has 4 divisors (see below), whose sum is σ = 145101009024. Its totient is φ = 144598928256.

The previous prime is 144849968591. The next prime is 144849968651. The reversal of 144849968639 is 936869948441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936869948441 = 7 ⋅133838564063.

It is a cyclic number.

It is not a de Polignac number, because 144849968639 - 2⁸ = 144849968383 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 (144849968539) 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, 125519327 + ... + 125520480.

It is an arithmetic number, because the mean of its divisors is an integer number (36275252256).

Almost surely, 2^144849968639 is an apocalyptic number.

144849968639 is a deficient number, since it is larger than the sum of its proper divisors (251040385).

144849968639 is an equidigital number, since it uses as much as digits as its factorization.

144849968639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251040384.

The product of its digits is 322486272, while the sum is 71.

The spelling of 144849968639 in words is "one hundred forty-four billion, eight hundred forty-nine million, nine hundred sixty-eight thousand, six hundred thirty-nine".