78081696 has 216 divisors, whose sum is σ = 282338784. Its totient is φ = 20240640.

The previous prime is 78081691. The next prime is 78081701. The reversal of 78081696 is 69618087.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78081691) and next prime (78081701).

It is not an unprimeable number, because it can be changed into a prime (78081691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 154981 + ... + 155483.

It is an arithmetic number, because the mean of its divisors is an integer number (1307124).

Almost surely, 2^78081696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78081696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141169392).

78081696 is an abundant number, since it is smaller than the sum of its proper divisors (204257088).

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

78081696 is a wasteful number, since it uses less digits than its factorization.

78081696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 78081696 is about 8836.3847811195. The cubic root of 78081696 is about 427.4149866861.

The spelling of 78081696 in words is "seventy-eight million, eighty-one thousand, six hundred ninety-six".