78500575 has 12 divisors (see below), whose sum is σ = 99413280. Its totient is φ = 61463360.

The previous prime is 78500573. The next prime is 78500599. The reversal of 78500575 is 57500587.

It is not a de Polignac number, because 78500575 - 2¹ = 78500573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78500573) 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 11 ways as a sum of consecutive naturals, for example, 32230 + ... + 34579.

It is an arithmetic number, because the mean of its divisors is an integer number (8284440).

Almost surely, 2^78500575 is an apocalyptic number.

78500575 is a deficient number, since it is larger than the sum of its proper divisors (20912705).

78500575 is a wasteful number, since it uses less digits than its factorization.

78500575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66866 (or 66861 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 78500575 is about 8860.0550224025. The cubic root of 78500575 is about 428.1779310122.

The spelling of 78500575 in words is "seventy-eight million, five hundred thousand, five hundred seventy-five".