80278978559 has 16 divisors (see below), whose sum is σ = 87074904000. Its totient is φ = 73572178176.

The previous prime is 80278978553. The next prime is 80278978609. The reversal of 80278978559 is 95587987208.

It is a cyclic number.

It is not a de Polignac number, because 80278978559 - 2³² = 75984011263 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 (80278978553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4781822 + ... + 4798580.

It is an arithmetic number, because the mean of its divisors is an integer number (5442181500).

Almost surely, 2^80278978559 is an apocalyptic number.

80278978559 is a deficient number, since it is larger than the sum of its proper divisors (6795925441).

80278978559 is a wasteful number, since it uses less digits than its factorization.

80278978559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19394.

The product of its (nonzero) digits is 101606400, while the sum is 68.

The spelling of 80278978559 in words is "eighty billion, two hundred seventy-eight million, nine hundred seventy-eight thousand, five hundred fifty-nine".