145631459009 has 4 divisors (see below), whose sum is σ = 145754772180. Its totient is φ = 145508145840.

The previous prime is 145631459003. The next prime is 145631459047. The reversal of 145631459009 is 900954136541.

It is a happy number.

145631459009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 59211922225 + 86419536784 = 243335^2 + 293972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145631459009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145631459003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61654814 + ... + 61657175.

It is an arithmetic number, because the mean of its divisors is an integer number (36438693045).

Almost surely, 2^145631459009 is an apocalyptic number.

It is an amenable number.

145631459009 is a deficient number, since it is larger than the sum of its proper divisors (123313171).

145631459009 is a wasteful number, since it uses less digits than its factorization.

145631459009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123313170.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 145631459009 in words is "one hundred forty-five billion, six hundred thirty-one million, four hundred fifty-nine thousand, nine".