78108081 has 16 divisors (see below), whose sum is σ = 112837824. Its totient is φ = 47867904.

The previous prime is 78108077. The next prime is 78108083. The reversal of 78108081 is 18080187.

It is not a de Polignac number, because 78108081 - 2² = 78108077 is a prime.

It is a super-2 number, since 2×78108081² = 12201744635005122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78108083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15616 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (7052364).

Almost surely, 2^78108081 is an apocalyptic number.

It is an amenable number.

78108081 is a deficient number, since it is larger than the sum of its proper divisors (34729743).

78108081 is a wasteful number, since it uses less digits than its factorization.

78108081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35680.

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 78108081 is about 8837.8776298385. The cubic root of 78108081 is about 427.4631246193.

The spelling of 78108081 in words is "seventy-eight million, one hundred eight thousand, eighty-one".