188648509843925 has 12 divisors (see below), whose sum is σ = 239629619334756. Its totient is φ = 147237861340800.

The previous prime is 188648509843909. The next prime is 188648509843967. The reversal of 188648509843925 is 529348905846881.

It can be written as a sum of positive squares in 6 ways, for example, as 2671112997316 + 185977396846609 = 1634354^2 + 13637353^2 .

It is not a de Polignac number, because 188648509843925 - 2⁴ = 188648509843909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 188648509843925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92023662314 + ... + 92023664363.

It is an arithmetic number, because the mean of its divisors is an integer number (19969134944563).

Almost surely, 2^{188648509843925} is an apocalyptic number.

It is an amenable number.

188648509843925 is a deficient number, since it is larger than the sum of its proper divisors (50981109490831).

188648509843925 is a wasteful number, since it uses less digits than its factorization.

188648509843925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184047326728 (or 184047326723 counting only the distinct ones).

The product of its (nonzero) digits is 4777574400, while the sum is 80.

The spelling of 188648509843925 in words is "one hundred eighty-eight trillion, six hundred forty-eight billion, five hundred nine million, eight hundred forty-three thousand, nine hundred twenty-five".