145745873173 has 4 divisors (see below), whose sum is σ = 149135312128. Its totient is φ = 142356434220.

The previous prime is 145745873153. The next prime is 145745873179. The reversal of 145745873173 is 371378547541.

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: 371378547541 = 89 ⋅4172792669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145745873173 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 (145745873179) 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, 1694719413 + ... + 1694719498.

It is an arithmetic number, because the mean of its divisors is an integer number (37283828032).

Almost surely, 2^145745873173 is an apocalyptic number.

It is an amenable number.

145745873173 is a deficient number, since it is larger than the sum of its proper divisors (3389438955).

145745873173 is an equidigital number, since it uses as much as digits as its factorization.

145745873173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389438954.

The product of its digits is 9878400, while the sum is 55.

The spelling of 145745873173 in words is "one hundred forty-five billion, seven hundred forty-five million, eight hundred seventy-three thousand, one hundred seventy-three".