154241868942225 has 45 divisors (see below), whose sum is σ = 285710294688907. Its totient is φ = 82262032036560.

The previous prime is 154241868942167. The next prime is 154241868942251. The reversal of 154241868942225 is 522249868142451.

The square root of 154241868942225 is 12419415.

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

154241868942225 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 4 + 186 + 8 + 9 + 422 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55527072819201 + 98714796123024 = 7451649^2 + 9935532^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 154241868942225 - 2¹⁹ = 154241868417937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 558735682 + ... + 559011668.

Almost surely, 2^{154241868942225} is an apocalyptic number.

154241868942225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

154241868942225 is the 12419415-th square number.

154241868942225 is the 6209708-th centered octagonal number.

It is an amenable number.

154241868942225 is a deficient number, since it is larger than the sum of its proper divisors (131468425746682).

154241868942225 is an frugal number, since it uses more digits than its factorization.

154241868942225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551996 (or 275995 counting only the distinct ones).

The product of its digits is 88473600, while the sum is 63.

The spelling of 154241868942225 in words is "one hundred fifty-four trillion, two hundred forty-one billion, eight hundred sixty-eight million, nine hundred forty-two thousand, two hundred twenty-five".