68512617 has 12 divisors (see below), whose sum is σ = 100319284. Its totient is φ = 45048960.

The previous prime is 68512603. The next prime is 68512687. The reversal of 68512617 is 71621586.

It can be written as a sum of positive squares in 2 ways, for example, as 32764176 + 35748441 = 5724^2 + 5979^2 .

It is not a de Polignac number, because 68512617 - 2¹⁵ = 68479849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68512687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51484 + ... + 52797.

Almost surely, 2^68512617 is an apocalyptic number.

It is an amenable number.

68512617 is a deficient number, since it is larger than the sum of its proper divisors (31806667).

68512617 is a wasteful number, since it uses less digits than its factorization.

68512617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104360 (or 104357 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 68512617 is about 8277.2348643735. The cubic root of 68512617 is about 409.1885935481.

The spelling of 68512617 in words is "sixty-eight million, five hundred twelve thousand, six hundred seventeen".