72843913315328 has 44 divisors (see below), whose sum is σ = 145636180586892. Its totient is φ = 36417081630720.

The previous prime is 72843913315321. The next prime is 72843913315343. The reversal of 72843913315328 is 82351331934827.

It can be written as a sum of positive squares in 2 ways, for example, as 30506091725824 + 42337821589504 = 5523232^2 + 6506752^2 .

It is not an unprimeable number, because it can be changed into a prime (72843913315321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2899418 + ... + 12413478.

Almost surely, 2^{72843913315328} is an apocalyptic number.

It is an amenable number.

72843913315328 is a deficient number, since it is larger than the sum of its proper divisors (72792267271564).

72843913315328 is an equidigital number, since it uses as much as digits as its factorization.

72843913315328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521558 (or 9521540 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 59.

The spelling of 72843913315328 in words is "seventy-two trillion, eight hundred forty-three billion, nine hundred thirteen million, three hundred fifteen thousand, three hundred twenty-eight".