78855265 has 8 divisors (see below), whose sum is σ = 100192680. Its totient is φ = 59373312.

The previous prime is 78855241. The next prime is 78855307. The reversal of 78855265 is 56255887.

It can be written as a sum of positive squares in 4 ways, for example, as 10445824 + 68409441 = 3232^2 + 8271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78855265 - 2⁵ = 78855233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463770 + ... + 463939.

It is an arithmetic number, because the mean of its divisors is an integer number (12524085).

Almost surely, 2^78855265 is an apocalyptic number.

It is an amenable number.

78855265 is a deficient number, since it is larger than the sum of its proper divisors (21337415).

78855265 is a wasteful number, since it uses less digits than its factorization.

78855265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927731.

The product of its digits is 672000, while the sum is 46.

The square root of 78855265 is about 8880.0487048214. The cubic root of 78855265 is about 428.8218425173.

The spelling of 78855265 in words is "seventy-eight million, eight hundred fifty-five thousand, two hundred sixty-five".