144664987745 has 8 divisors (see below), whose sum is σ = 174273465384. Its totient is φ = 115281670144.

The previous prime is 144664987741. The next prime is 144664987829. The reversal of 144664987745 is 547789466441.

It can be written as a sum of positive squares in 4 ways, for example, as 101004467344 + 43660520401 = 317812^2 + 208951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144664987745 - 2² = 144664987741 is a prime.

It is a super-2 number, since 2×144664987745² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144664987741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56288594 + ... + 56291163.

It is an arithmetic number, because the mean of its divisors is an integer number (21784183173).

Almost surely, 2^144664987745 is an apocalyptic number.

It is an amenable number.

144664987745 is a deficient number, since it is larger than the sum of its proper divisors (29608477639).

144664987745 is a wasteful number, since it uses less digits than its factorization.

144664987745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112580019.

The product of its digits is 162570240, while the sum is 65.

The spelling of 144664987745 in words is "one hundred forty-four billion, six hundred sixty-four million, nine hundred eighty-seven thousand, seven hundred forty-five".