1188328911025 has 9 divisors (see below), whose sum is σ = 1473534608353. Its totient is φ = 950658768400.

The previous prime is 1188328910957. The next prime is 1188328911041. The reversal of 1188328911025 is 5201198238811.

It is a happy number.

The square root of 1188328911025 is 1090105.

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 109688803249 + 1078640107776 = 331193^2 + 1038576^2 .

It is not a de Polignac number, because 1188328911025 - 2⁹ = 1188328910513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1188328911025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5341515 + ... + 5559535.

Almost surely, 2^{1188328911025} is an apocalyptic number.

1188328911025 is the 1090105-th square number.

1188328911025 is the 545053-rd centered octagonal number.

It is an amenable number.

1188328911025 is a deficient number, since it is larger than the sum of its proper divisors (285205697328).

1188328911025 is an frugal number, since it uses more digits than its factorization.

1188328911025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436052 (or 218026 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 49.

Multiplying 1188328911025 by its sum of digits (49), we get a square (58228116640225 = 7630735²).

The spelling of 1188328911025 in words is "one trillion, one hundred eighty-eight billion, three hundred twenty-eight million, nine hundred eleven thousand, twenty-five".