145406132173 has 4 divisors (see below), whose sum is σ = 146467490940. Its totient is φ = 144344773408.

The previous prime is 145406132159. The next prime is 145406132177. The reversal of 145406132173 is 371231604541.

It is a happy number.

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 123005921284 + 22400210889 = 350722^2 + 149667^2 .

It is a cyclic number.

It is not a de Polignac number, because 145406132173 - 2²⁹ = 144869261261 is a prime.

It is a super-2 number, since 2×145406132173² (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 (145406132177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530679178 + ... + 530679451.

It is an arithmetic number, because the mean of its divisors is an integer number (36616872735).

Almost surely, 2^145406132173 is an apocalyptic number.

It is an amenable number.

145406132173 is a deficient number, since it is larger than the sum of its proper divisors (1061358767).

145406132173 is a wasteful number, since it uses less digits than its factorization.

145406132173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061358766.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 145406132173 in words is "one hundred forty-five billion, four hundred six million, one hundred thirty-two thousand, one hundred seventy-three".