78853825 has 6 divisors (see below), whose sum is σ = 97778774. Its totient is φ = 63083040.

The previous prime is 78853823. The next prime is 78853937. The reversal of 78853825 is 52835887.

It can be written as a sum of positive squares in 3 ways, for example, as 725904 + 78127921 = 852^2 + 8839^2 .

It is not a de Polignac number, because 78853825 - 2¹ = 78853823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78853823) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1577052 + ... + 1577101.

Almost surely, 2^78853825 is an apocalyptic number.

It is an amenable number.

78853825 is a deficient number, since it is larger than the sum of its proper divisors (18924949).

78853825 is a wasteful number, since it uses less digits than its factorization.

78853825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154163 (or 3154158 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 78853825 is about 8879.9676238149. The cubic root of 78853825 is about 428.8192322193.

The spelling of 78853825 in words is "seventy-eight million, eight hundred fifty-three thousand, eight hundred twenty-five".