78055818 has 8 divisors (see below), whose sum is σ = 156111648. Its totient is φ = 26018604.

The previous prime is 78055811. The next prime is 78055837. The reversal of 78055818 is 81855087.

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

78055818 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 78055818.

It is not an unprimeable number, because it can be changed into a prime (78055811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6504646 + ... + 6504657.

It is an arithmetic number, because the mean of its divisors is an integer number (19513956).

Almost surely, 2^78055818 is an apocalyptic number.

78055818 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.

78055818 is a wasteful number, since it uses less digits than its factorization.

78055818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13009308.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 78055818 is about 8834.9203731556. The cubic root of 78055818 is about 427.3677632106.

The spelling of 78055818 in words is "seventy-eight million, fifty-five thousand, eight hundred eighteen".