78555125 has 16 divisors (see below), whose sum is σ = 106951104. Its totient is φ = 57130000.

The previous prime is 78555121. The next prime is 78555133. The reversal of 78555125 is 52155587.

It is not a de Polignac number, because 78555125 - 2² = 78555121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78555121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27191 + ... + 29940.

It is an arithmetic number, because the mean of its divisors is an integer number (6684444).

Almost surely, 2^78555125 is an apocalyptic number.

It is an amenable number.

78555125 is a deficient number, since it is larger than the sum of its proper divisors (28395979).

78555125 is a wasteful number, since it uses less digits than its factorization.

78555125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57157 (or 57147 counting only the distinct ones).

The product of its digits is 70000, while the sum is 38.

The square root of 78555125 is about 8863.1329111099. The cubic root of 78555125 is about 428.2770882390.

The spelling of 78555125 in words is "seventy-eight million, five hundred fifty-five thousand, one hundred twenty-five".