68772720212217 has 24 divisors (see below), whose sum is σ = 113537734804416. Its totient is φ = 39295870942176.

The previous prime is 68772720212213. The next prime is 68772720212221. The reversal of 68772720212217 is 71221202727786.

68772720212217 is a `hidden beast` number, since 6 + 87 + 72 + 72 + 0 + 212 + 217 = 666.

It is an interprime number because it is at equal distance from previous prime (68772720212213) and next prime (68772720212221).

It is not a de Polignac number, because 68772720212217 - 2² = 68772720212213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68772720212213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38371378 + ... + 40123659.

It is an arithmetic number, because the mean of its divisors is an integer number (4730738950184).

Almost surely, 2^{68772720212217} is an apocalyptic number.

It is an amenable number.

68772720212217 is a deficient number, since it is larger than the sum of its proper divisors (44765014592199).

68772720212217 is a wasteful number, since it uses less digits than its factorization.

68772720212217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78508957 (or 78508954 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 54.

The spelling of 68772720212217 in words is "sixty-eight trillion, seven hundred seventy-two billion, seven hundred twenty million, two hundred twelve thousand, two hundred seventeen".