72217167385 has 8 divisors (see below), whose sum is σ = 94538837376. Its totient is φ = 52521576240.

The previous prime is 72217167377. The next prime is 72217167403. The reversal of 72217167385 is 58376171227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72217167385 - 2³ = 72217167377 is a prime.

It is a super-2 number, since 2×72217167385² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656519649 + ... + 656519758.

It is an arithmetic number, because the mean of its divisors is an integer number (11817354672).

Almost surely, 2^72217167385 is an apocalyptic number.

It is an amenable number.

72217167385 is a deficient number, since it is larger than the sum of its proper divisors (22321669991).

72217167385 is a wasteful number, since it uses less digits than its factorization.

72217167385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313039423.

The product of its digits is 987840, while the sum is 49.

The spelling of 72217167385 in words is "seventy-two billion, two hundred seventeen million, one hundred sixty-seven thousand, three hundred eighty-five".