65681290841 has 4 divisors (see below), whose sum is σ = 65682433152. Its totient is φ = 65680148532.

The previous prime is 65681290819. The next prime is 65681290849. The reversal of 65681290841 is 14809218656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65681290841 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 65681290841.

It is not an unprimeable number, because it can be changed into a prime (65681290849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480065 + ... + 601518.

It is an arithmetic number, because the mean of its divisors is an integer number (16420608288).

Almost surely, 2^65681290841 is an apocalyptic number.

It is an amenable number.

65681290841 is a deficient number, since it is larger than the sum of its proper divisors (1142311).

65681290841 is a wasteful number, since it uses less digits than its factorization.

65681290841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142310.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 65681290841 in words is "sixty-five billion, six hundred eighty-one million, two hundred ninety thousand, eight hundred forty-one".