7321773816 has 256 divisors, whose sum is σ = 24414566400. Its totient is φ = 1987780608.

The previous prime is 7321773779. The next prime is 7321773827. The reversal of 7321773816 is 6183771237.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6015640 + ... + 6016856.

It is an arithmetic number, because the mean of its divisors is an integer number (95369400).

Almost surely, 2^7321773816 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 7321773816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12207283200).

7321773816 is an abundant number, since it is smaller than the sum of its proper divisors (17092792584).

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

7321773816 is a wasteful number, since it uses less digits than its factorization.

7321773816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1425 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 7321773816 is about 85567.3641992086. The cubic root of 7321773816 is about 1941.8042003418.

The spelling of 7321773816 in words is "seven billion, three hundred twenty-one million, seven hundred seventy-three thousand, eight hundred sixteen".