144664761545 has 4 divisors (see below), whose sum is σ = 173597713860. Its totient is φ = 115731809232.

The previous prime is 144664761499. The next prime is 144664761581. The reversal of 144664761545 is 545167466441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113987939641 + 30676821904 = 337621^2 + 175148^2 .

It is a cyclic number.

It is not a de Polignac number, because 144664761545 - 2¹⁶ = 144664696009 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 14466476150 + ... + 14466476159.

It is an arithmetic number, because the mean of its divisors is an integer number (43399428465).

Almost surely, 2^144664761545 is an apocalyptic number.

It is an amenable number.

144664761545 is a deficient number, since it is larger than the sum of its proper divisors (28932952315).

144664761545 is an equidigital number, since it uses as much as digits as its factorization.

144664761545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28932952314.

The product of its digits is 9676800, while the sum is 53.

The spelling of 144664761545 in words is "one hundred forty-four billion, six hundred sixty-four million, seven hundred sixty-one thousand, five hundred forty-five".