144965617381 has 4 divisors (see below), whose sum is σ = 156116818732. Its totient is φ = 133814416032.

The previous prime is 144965617373. The next prime is 144965617393. The reversal of 144965617381 is 183716569441.

144965617381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183716569441 = 383 ⋅479677727.

It can be written as a sum of positive squares in 2 ways, for example, as 7580488356 + 137385129025 = 87066^2 + 370655^2 .

It is a cyclic number.

It is not a de Polignac number, because 144965617381 - 2³ = 144965617373 is a prime.

It is a super-2 number, since 2×144965617381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144965618381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5575600656 + ... + 5575600681.

It is an arithmetic number, because the mean of its divisors is an integer number (39029204683).

Almost surely, 2^144965617381 is an apocalyptic number.

It is an amenable number.

144965617381 is a deficient number, since it is larger than the sum of its proper divisors (11151201351).

144965617381 is a wasteful number, since it uses less digits than its factorization.

144965617381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11151201350.

The product of its digits is 4354560, while the sum is 55.

The spelling of 144965617381 in words is "one hundred forty-four billion, nine hundred sixty-five million, six hundred seventeen thousand, three hundred eighty-one".