144441520061661 has 12 divisors (see below), whose sum is σ = 208859470395420. Its totient is φ = 96192014771520.

The previous prime is 144441520061627. The next prime is 144441520061689. The reversal of 144441520061661 is 166160025144441.

144441520061661 is a `hidden beast` number, since 1 + 4 + 4 + 4 + 4 + 1 + 5 + 20 + 0 + 616 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59237359089561 + 85204160972100 = 7696581^2 + 9230610^2 .

It is not a de Polignac number, because 144441520061661 - 2⁷ = 144441520061533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144441520061161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8527652416 + ... + 8527669353.

It is an arithmetic number, because the mean of its divisors is an integer number (17404955866285).

Almost surely, 2^{144441520061661} is an apocalyptic number.

It is an amenable number.

144441520061661 is a deficient number, since it is larger than the sum of its proper divisors (64417950333759).

144441520061661 is a wasteful number, since it uses less digits than its factorization.

144441520061661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055322716 (or 17055322713 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 144441520061661 in words is "one hundred forty-four trillion, four hundred forty-one billion, five hundred twenty million, sixty-one thousand, six hundred sixty-one".