145660539025 has 27 divisors (see below), whose sum is σ = 185722625361. Its totient is φ = 113324055840.

The previous prime is 145660539023. The next prime is 145660539041. The reversal of 145660539025 is 520935066541.

The square root of 145660539025 is 381655.

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

It can be written as a sum of positive squares in 4 ways, for example, as 13827643281 + 131832895744 = 117591^2 + 363088^2 .

It is not a de Polignac number, because 145660539025 - 2¹ = 145660539023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145660539023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 70605144 + ... + 70607206.

Almost surely, 2^145660539025 is an apocalyptic number.

145660539025 is the 381655-th square number.

145660539025 is the 190828-th centered octagonal number.

It is an amenable number.

145660539025 is a deficient number, since it is larger than the sum of its proper divisors (40062086336).

145660539025 is an frugal number, since it uses more digits than its factorization.

145660539025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 2105 counting only the distinct ones).

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

The spelling of 145660539025 in words is "one hundred forty-five billion, six hundred sixty million, five hundred thirty-nine thousand, twenty-five".