78080111 has 4 divisors (see below), whose sum is σ = 78105672. Its totient is φ = 78054552.

The previous prime is 78080089. The next prime is 78080141. The reversal of 78080111 is 11108087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78080111 - 2⁶ = 78080047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78080141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7460 + ... + 14553.

It is an arithmetic number, because the mean of its divisors is an integer number (19526418).

Almost surely, 2^78080111 is an apocalyptic number.

78080111 is a deficient number, since it is larger than the sum of its proper divisors (25561).

78080111 is a wasteful number, since it uses less digits than its factorization.

78080111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25560.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 78080111 is about 8836.2950946650. The cubic root of 78080111 is about 427.4120945984.

Adding to 78080111 its reverse (11108087), we get a palindrome (89188198).

The spelling of 78080111 in words is "seventy-eight million, eighty thousand, one hundred eleven".