18078075280 has 40 divisors (see below), whose sum is σ = 42824582712. Its totient is φ = 7094790144.

The previous prime is 18078075269. The next prime is 18078075283. The reversal of 18078075280 is 8257087081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1035294976 + 17042780304 = 32176^2 + 130548^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 18078075280.

It is not an unprimeable number, because it can be changed into a prime (18078075283) 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 7 ways as a sum of consecutive naturals, for example, 2127609 + ... + 2136088.

Almost surely, 2^18078075280 is an apocalyptic number.

18078075280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18078075280 is an abundant number, since it is smaller than the sum of its proper divisors (24746507432).

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

18078075280 is a wasteful number, since it uses less digits than its factorization.

18078075280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263763 (or 4263757 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 46.

The spelling of 18078075280 in words is "eighteen billion, seventy-eight million, seventy-five thousand, two hundred eighty".