65941256565 has 48 divisors (see below), whose sum is σ = 126283442688. Its totient is φ = 31660789248.

The previous prime is 65941256561. The next prime is 65941256651. The reversal of 65941256565 is 56565214956.

It is a happy number.

65941256565 is a `hidden beast` number, since 6 + 5 + 9 + 4 + 12 + 565 + 65 = 666.

It is not a de Polignac number, because 65941256565 - 2² = 65941256561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65941256561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1856269 + ... + 1891458.

It is an arithmetic number, because the mean of its divisors is an integer number (2630905056).

Almost surely, 2^65941256565 is an apocalyptic number.

It is an amenable number.

65941256565 is a deficient number, since it is larger than the sum of its proper divisors (60342186123).

65941256565 is a wasteful number, since it uses less digits than its factorization.

65941256565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747778 (or 3747775 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 54.

The spelling of 65941256565 in words is "sixty-five billion, nine hundred forty-one million, two hundred fifty-six thousand, five hundred sixty-five".