188520666025 has 24 divisors (see below), whose sum is σ = 240237623808. Its totient is φ = 146664720000.

The previous prime is 188520666013. The next prime is 188520666041. The reversal of 188520666025 is 520666025881.

It is not a de Polignac number, because 188520666025 - 2⁹ = 188520665513 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 188520666025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23080 + ... + 614470.

It is an arithmetic number, because the mean of its divisors is an integer number (10009900992).

Almost surely, 2^188520666025 is an apocalyptic number.

It is an amenable number.

188520666025 is a deficient number, since it is larger than the sum of its proper divisors (51716957783).

188520666025 is a wasteful number, since it uses less digits than its factorization.

188520666025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591753 (or 591748 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 188520666025 in words is "one hundred eighty-eight billion, five hundred twenty million, six hundred sixty-six thousand, twenty-five".