78648558 has 8 divisors (see below), whose sum is σ = 157297128. Its totient is φ = 26216184.

The previous prime is 78648547. The next prime is 78648571. The reversal of 78648558 is 85584687.

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

78648558 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 78648558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6554041 + ... + 6554052.

It is an arithmetic number, because the mean of its divisors is an integer number (19662141).

Almost surely, 2^78648558 is an apocalyptic number.

78648558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78648558 is a wasteful number, since it uses less digits than its factorization.

78648558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108098.

The product of its digits is 2150400, while the sum is 51.

The square root of 78648558 is about 8868.4022236252. The cubic root of 78648558 is about 428.4468177083.

The spelling of 78648558 in words is "seventy-eight million, six hundred forty-eight thousand, five hundred fifty-eight".