65838623717 has 8 divisors (see below), whose sum is σ = 66486288960. Its totient is φ = 65191121280.

The previous prime is 65838623693. The next prime is 65838623749. The reversal of 65838623717 is 71732683856.

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

It is a cyclic number.

It is not a de Polignac number, because 65838623717 - 2¹⁸ = 65838361573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65838623017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872117 + ... + 944597.

It is an arithmetic number, because the mean of its divisors is an integer number (8310786120).

Almost surely, 2^65838623717 is an apocalyptic number.

It is an amenable number.

65838623717 is a deficient number, since it is larger than the sum of its proper divisors (647665243).

65838623717 is a wasteful number, since it uses less digits than its factorization.

65838623717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81403.

The product of its digits is 10160640, while the sum is 56.

The spelling of 65838623717 in words is "sixty-five billion, eight hundred thirty-eight million, six hundred twenty-three thousand, seven hundred seventeen".