145565320069 has 8 divisors (see below), whose sum is σ = 159720439032. Its totient is φ = 131832742080.

The previous prime is 145565320067. The next prime is 145565320081. The reversal of 145565320069 is 960023565541.

It can be written as a sum of positive squares in 4 ways, for example, as 43892345025 + 101672975044 = 209505^2 + 318862^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145565320069 - 2¹ = 145565320067 is a prime.

It is a super-2 number, since 2×145565320069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145565320063) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 105634522 + ... + 105635899.

It is an arithmetic number, because the mean of its divisors is an integer number (19965054879).

Almost surely, 2^145565320069 is an apocalyptic number.

It is an amenable number.

145565320069 is a deficient number, since it is larger than the sum of its proper divisors (14155118963).

145565320069 is a wasteful number, since it uses less digits than its factorization.

145565320069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211270487.

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

The spelling of 145565320069 in words is "one hundred forty-five billion, five hundred sixty-five million, three hundred twenty thousand, sixty-nine".