72217652761 has 8 divisors (see below), whose sum is σ = 74215696320. Its totient is φ = 70222041648.

The previous prime is 72217652753. The next prime is 72217652783. The reversal of 72217652761 is 16725671227.

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

It is a cyclic number.

It is not a de Polignac number, because 72217652761 - 2³ = 72217652753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72217352761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547831 + ... + 666748.

It is an arithmetic number, because the mean of its divisors is an integer number (9276962040).

Almost surely, 2^72217652761 is an apocalyptic number.

It is an amenable number.

72217652761 is a deficient number, since it is larger than the sum of its proper divisors (1998043559).

72217652761 is a wasteful number, since it uses less digits than its factorization.

72217652761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216223.

The product of its digits is 493920, while the sum is 46.

The spelling of 72217652761 in words is "seventy-two billion, two hundred seventeen million, six hundred fifty-two thousand, seven hundred sixty-one".