12978785727225 has 96 divisors (see below), whose sum is σ = 24692756705280. Its totient is φ = 6679321992000.

The previous prime is 12978785727143. The next prime is 12978785727247. The reversal of 12978785727225 is 52272758787921.

12978785727225 is a `hidden beast` number, since 1 + 29 + 7 + 8 + 7 + 8 + 572 + 7 + 2 + 25 = 666.

It is not a de Polignac number, because 12978785727225 - 2⁷ = 12978785727097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 628531 + ... + 5133480.

It is an arithmetic number, because the mean of its divisors is an integer number (257216215680).

Almost surely, 2^{12978785727225} is an apocalyptic number.

12978785727225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12978785727225 is a deficient number, since it is larger than the sum of its proper divisors (11713970978055).

12978785727225 is a wasteful number, since it uses less digits than its factorization.

12978785727225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762148 (or 5762137 counting only the distinct ones).

The product of its digits is 553190400, while the sum is 72.

The spelling of 12978785727225 in words is "twelve trillion, nine hundred seventy-eight billion, seven hundred eighty-five million, seven hundred twenty-seven thousand, two hundred twenty-five".