65802540217 has 8 divisors (see below), whose sum is σ = 66112266240. Its totient is φ = 65493533280.

The previous prime is 65802540163. The next prime is 65802540233. The reversal of 65802540217 is 71204520856.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65802540217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65802540217.

It is not an unprimeable number, because it can be changed into a prime (65802540247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4117 + ... + 362797.

It is an arithmetic number, because the mean of its divisors is an integer number (8264033280).

Almost surely, 2^65802540217 is an apocalyptic number.

It is an amenable number.

65802540217 is a deficient number, since it is larger than the sum of its proper divisors (309726023).

65802540217 is a wasteful number, since it uses less digits than its factorization.

65802540217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359543.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 65802540217 in words is "sixty-five billion, eight hundred two million, five hundred forty thousand, two hundred seventeen".