68641717465 has 8 divisors (see below), whose sum is σ = 83185606728. Its totient is φ = 54369676800.

The previous prime is 68641717457. The next prime is 68641717493. The reversal of 68641717465 is 56471714686.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8837504064 + 59804213401 = 94008^2 + 244549^2 .

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

It is not a de Polignac number, because 68641717465 - 2³ = 68641717457 is a prime.

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, 67961592 + ... + 67962601.

It is an arithmetic number, because the mean of its divisors is an integer number (10398200841).

Almost surely, 2^68641717465 is an apocalyptic number.

It is an amenable number.

68641717465 is a deficient number, since it is larger than the sum of its proper divisors (14543889263).

68641717465 is a wasteful number, since it uses less digits than its factorization.

68641717465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135924299.

The product of its digits is 6773760, while the sum is 55.

The spelling of 68641717465 in words is "sixty-eight billion, six hundred forty-one million, seven hundred seventeen thousand, four hundred sixty-five".