78745518 has 24 divisors (see below), whose sum is σ = 176120256. Its totient is φ = 25401600.

The previous prime is 78745517. The next prime is 78745523. The reversal of 78745518 is 81554787.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78745517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70003 + ... + 71118.

It is an arithmetic number, because the mean of its divisors is an integer number (7338344).

Almost surely, 2^78745518 is an apocalyptic number.

78745518 is an abundant number, since it is smaller than the sum of its proper divisors (97374738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78745518 is a wasteful number, since it uses less digits than its factorization.

78745518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141160 (or 141157 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 78745518 is about 8873.8671389648. The cubic root of 78745518 is about 428.6228122201.

The spelling of 78745518 in words is "seventy-eight million, seven hundred forty-five thousand, five hundred eighteen".