65497568189 has 16 divisors (see below), whose sum is σ = 69650275200. Its totient is φ = 61416605376.

The previous prime is 65497568179. The next prime is 65497568221. The reversal of 65497568189 is 98186579456.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65497568189 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 (65497568179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019707 + ... + 2051879.

It is an arithmetic number, because the mean of its divisors is an integer number (4353142200).

Almost surely, 2^65497568189 is an apocalyptic number.

It is an amenable number.

65497568189 is a deficient number, since it is larger than the sum of its proper divisors (4152707011).

65497568189 is a wasteful number, since it uses less digits than its factorization.

65497568189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33284.

The product of its digits is 130636800, while the sum is 68.

The spelling of 65497568189 in words is "sixty-five billion, four hundred ninety-seven million, five hundred sixty-eight thousand, one hundred eighty-nine".