80278818018 has 48 divisors (see below), whose sum is σ = 184629646656. Its totient is φ = 22795771680.

The previous prime is 80278817977. The next prime is 80278818023. The reversal of 80278818018 is 81081887208.

It is a super-2 number, since 2×80278818018² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1079928 + ... + 1151868.

It is an arithmetic number, because the mean of its divisors is an integer number (3846450972).

Almost surely, 2^80278818018 is an apocalyptic number.

80278818018 is an abundant number, since it is smaller than the sum of its proper divisors (104350828638).

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

80278818018 is a wasteful number, since it uses less digits than its factorization.

80278818018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72279 (or 72116 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 51.

The spelling of 80278818018 in words is "eighty billion, two hundred seventy-eight million, eight hundred eighteen thousand, eighteen".