78575585 has 16 divisors (see below), whose sum is σ = 103721472. Its totient is φ = 57141040.

The previous prime is 78575579. The next prime is 78575591. The reversal of 78575585 is 58557587.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78575579) and next prime (78575591).

It is not a de Polignac number, because 78575585 - 2⁴ = 78575569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 752 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (6482592).

Almost surely, 2^78575585 is an apocalyptic number.

It is an amenable number.

78575585 is a deficient number, since it is larger than the sum of its proper divisors (25145887).

78575585 is a wasteful number, since it uses less digits than its factorization.

78575585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11845 (or 11823 counting only the distinct ones).

The product of its digits is 1960000, while the sum is 50.

The square root of 78575585 is about 8864.2870553700. The cubic root of 78575585 is about 428.3142671779.

The spelling of 78575585 in words is "seventy-eight million, five hundred seventy-five thousand, five hundred eighty-five".