73091280000 has 320 divisors, whose sum is σ = 249195481920. Its totient is φ = 18961920000.

The previous prime is 73091279983. The next prime is 73091280001. The reversal of 73091280000 is 8219037.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 73091280000.

It is not an unprimeable number, because it can be changed into a prime (73091280001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8875885 + ... + 8884115.

It is an arithmetic number, because the mean of its divisors is an integer number (778735881).

Almost surely, 2^73091280000 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 73091280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124597740960).

73091280000 is an abundant number, since it is smaller than the sum of its proper divisors (176104201920).

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

73091280000 is an equidigital number, since it uses as much as digits as its factorization.

73091280000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8305 (or 8278 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

Adding to 73091280000 its reverse (8219037), we get a palindrome (73099499037).

The spelling of 73091280000 in words is "seventy-three billion, ninety-one million, two hundred eighty thousand".