65834805381 has 16 divisors (see below), whose sum is σ = 89516275200. Its totient is φ = 43025748848.

The previous prime is 65834805359. The next prime is 65834805391. The reversal of 65834805381 is 18350843856.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65834805381 - 2⁵ = 65834805349 is a prime.

It is a super-2 number, since 2×65834805381² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65834805341) 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 15 ways as a sum of consecutive naturals, for example, 454491 + ... + 581576.

It is an arithmetic number, because the mean of its divisors is an integer number (5594767200).

Almost surely, 2^65834805381 is an apocalyptic number.

It is an amenable number.

65834805381 is a deficient number, since it is larger than the sum of its proper divisors (23681469819).

65834805381 is a wasteful number, since it uses less digits than its factorization.

65834805381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036488.

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 65834805381 in words is "sixty-five billion, eight hundred thirty-four million, eight hundred five thousand, three hundred eighty-one".