145206563509 has 16 divisors (see below), whose sum is σ = 176317171200. Its totient is φ = 116810103024.

The previous prime is 145206563461. The next prime is 145206563533. The reversal of 145206563509 is 905365602541.

It is a cyclic number.

It is not a de Polignac number, because 145206563509 - 2⁹ = 145206562997 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 (145206563569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5087539 + ... + 5116000.

It is an arithmetic number, because the mean of its divisors is an integer number (11019823200).

Almost surely, 2^145206563509 is an apocalyptic number.

145206563509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145206563509 is a deficient number, since it is larger than the sum of its proper divisors (31110607691).

145206563509 is a wasteful number, since it uses less digits than its factorization.

145206563509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203672.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 145206563509 in words is "one hundred forty-five billion, two hundred six million, five hundred sixty-three thousand, five hundred nine".