144787220321671 has 4 divisors (see below), whose sum is σ = 144909817461144. Its totient is φ = 144664623182200.

The previous prime is 144787220321633. The next prime is 144787220321699. The reversal of 144787220321671 is 176123022787441.

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

It is a cyclic number.

It is not a de Polignac number, because 144787220321671 - 2³⁹ = 144237464507783 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 (144787220321071) 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, 61298567965 + ... + 61298570326.

It is an arithmetic number, because the mean of its divisors is an integer number (36227454365286).

Almost surely, 2^{144787220321671} is an apocalyptic number.

144787220321671 is a deficient number, since it is larger than the sum of its proper divisors (122597139473).

144787220321671 is a wasteful number, since it uses less digits than its factorization.

144787220321671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122597139472.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 144787220321671 in words is "one hundred forty-four trillion, seven hundred eighty-seven billion, two hundred twenty million, three hundred twenty-one thousand, six hundred seventy-one".