68651574617 has 4 divisors (see below), whose sum is σ = 69592007220. Its totient is φ = 67711142016.

The previous prime is 68651574601. The next prime is 68651574653. The reversal of 68651574617 is 71647515686.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27997320976 + 40654253641 = 167324^2 + 201629^2 .

It is a cyclic number.

It is not a de Polignac number, because 68651574617 - 2⁴ = 68651574601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68651574697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470216192 + ... + 470216337.

It is an arithmetic number, because the mean of its divisors is an integer number (17398001805).

Almost surely, 2^68651574617 is an apocalyptic number.

It is an amenable number.

68651574617 is a deficient number, since it is larger than the sum of its proper divisors (940432603).

68651574617 is an equidigital number, since it uses as much as digits as its factorization.

68651574617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940432602.

The product of its digits is 8467200, while the sum is 56.

The spelling of 68651574617 in words is "sixty-eight billion, six hundred fifty-one million, five hundred seventy-four thousand, six hundred seventeen".