144531935405 has 24 divisors (see below), whose sum is σ = 205303352856. Its totient is φ = 97028426880.

The previous prime is 144531935399. The next prime is 144531935419. The reversal of 144531935405 is 504539135441.

It can be written as a sum of positive squares in 4 ways, for example, as 202606756 + 144329328649 = 14234^2 + 379907^2 .

It is not a de Polignac number, because 144531935405 - 2²² = 144527741101 is a prime.

It is a Duffinian number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 9180434 + ... + 9196163.

It is an arithmetic number, because the mean of its divisors is an integer number (8554306369).

Almost surely, 2^144531935405 is an apocalyptic number.

It is an amenable number.

144531935405 is a deficient number, since it is larger than the sum of its proper divisors (60771417451).

144531935405 is a wasteful number, since it uses less digits than its factorization.

144531935405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18376637 (or 18376626 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

Subtracting 144531935405 from its reverse (504539135441), we obtain a square (360007200036 = 600006²).

The spelling of 144531935405 in words is "one hundred forty-four billion, five hundred thirty-one million, nine hundred thirty-five thousand, four hundred five".