145020617329 has 4 divisors (see below), whose sum is σ = 165737848384. Its totient is φ = 124303386276.

The previous prime is 145020617321. The next prime is 145020617351. The reversal of 145020617329 is 923716020541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923716020541 = 73 ⋅12653644117.

It is a cyclic number.

It is not a de Polignac number, because 145020617329 - 2³ = 145020617321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145020617291 and 145020617300.

It is not an unprimeable number, because it can be changed into a prime (145020617321) 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 3 ways as a sum of consecutive naturals, for example, 10358615517 + ... + 10358615530.

It is an arithmetic number, because the mean of its divisors is an integer number (41434462096).

Almost surely, 2^145020617329 is an apocalyptic number.

It is an amenable number.

145020617329 is a deficient number, since it is larger than the sum of its proper divisors (20717231055).

145020617329 is an equidigital number, since it uses as much as digits as its factorization.

145020617329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20717231054.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 145020617329 in words is "one hundred forty-five billion, twenty million, six hundred seventeen thousand, three hundred twenty-nine".