80278978608 has 80 divisors (see below), whose sum is σ = 230951111040. Its totient is φ = 26699190336.

The previous prime is 80278978553. The next prime is 80278978609. The reversal of 80278978608 is 80687987208.

It is not an unprimeable number, because it can be changed into a prime (80278978609) 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, 18366 + ... + 401117.

It is an arithmetic number, because the mean of its divisors is an integer number (2886888888).

Almost surely, 2^80278978608 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 80278978608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115475555520).

80278978608 is an abundant number, since it is smaller than the sum of its proper divisors (150672132432).

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

80278978608 is a wasteful number, since it uses less digits than its factorization.

80278978608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419943 (or 419931 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 80278978608 in words is "eighty billion, two hundred seventy-eight million, nine hundred seventy-eight thousand, six hundred eight".