72217271593 has 2 divisors, whose sum is σ = 72217271594. Its totient is φ = 72217271592.

The previous prime is 72217271561. The next prime is 72217271647. The reversal of 72217271593 is 39517271227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45816546304 + 26400725289 = 214048^2 + 162483^2 .

It is a cyclic number.

It is not a de Polignac number, because 72217271593 - 2⁵ = 72217271561 is a prime.

It is a super-3 number, since 3×72217271593³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (72217272593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36108635796 + 36108635797.

It is an arithmetic number, because the mean of its divisors is an integer number (36108635797).

Almost surely, 2^72217271593 is an apocalyptic number.

It is an amenable number.

72217271593 is a deficient number, since it is larger than the sum of its proper divisors (1).

72217271593 is an equidigital number, since it uses as much as digits as its factorization.

72217271593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 46.

The spelling of 72217271593 in words is "seventy-two billion, two hundred seventeen million, two hundred seventy-one thousand, five hundred ninety-three".