73845281280018 has 32 divisors (see below), whose sum is σ = 148576622576256. Its totient is φ = 24467420435328.

The previous prime is 73845281279999. The next prime is 73845281280037. The reversal of 73845281280018 is 81008218254837.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73845281279999) and next prime (73845281280037).

It is a self number, because there is not a number n which added to its sum of digits gives 73845281280018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99985380 + ... + 100721232.

It is an arithmetic number, because the mean of its divisors is an integer number (4643019455508).

Almost surely, 2^{73845281280018} is an apocalyptic number.

73845281280018 is an abundant number, since it is smaller than the sum of its proper divisors (74731341296238).

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

73845281280018 is a wasteful number, since it uses less digits than its factorization.

73845281280018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836178.

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 73845281280018 in words is "seventy-three trillion, eight hundred forty-five billion, two hundred eighty-one million, two hundred eighty thousand, eighteen".