145454518225 has 27 divisors (see below), whose sum is σ = 182761709403. Its totient is φ = 114836549040.

The previous prime is 145454518219. The next prime is 145454518243. The reversal of 145454518225 is 522815454541.

The square root of 145454518225 is 381385.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 52363626561 + 93090891664 = 228831^2 + 305108^2 .

It is not a de Polignac number, because 145454518225 - 2¹⁷ = 145454387153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 158274316 + ... + 158275234.

Almost surely, 2^145454518225 is an apocalyptic number.

145454518225 is the 381385-th square number.

145454518225 is the 190693-rd centered octagonal number.

It is an amenable number.

145454518225 is a deficient number, since it is larger than the sum of its proper divisors (37307191178).

145454518225 is an frugal number, since it uses more digits than its factorization.

145454518225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 1007 counting only the distinct ones).

The product of its digits is 1280000, while the sum is 46.

The spelling of 145454518225 in words is "one hundred forty-five billion, four hundred fifty-four million, five hundred eighteen thousand, two hundred twenty-five".