65531071745743 has 4 divisors (see below), whose sum is σ = 65534682490200. Its totient is φ = 65527461001288.

The previous prime is 65531071745707. The next prime is 65531071745749. The reversal of 65531071745743 is 34754717013556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65531071745743 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65531071745749) 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, 1805345005 + ... + 1805381302.

It is an arithmetic number, because the mean of its divisors is an integer number (16383670622550).

Almost surely, 2^{65531071745743} is an apocalyptic number.

65531071745743 is a deficient number, since it is larger than the sum of its proper divisors (3610744457).

65531071745743 is a wasteful number, since it uses less digits than its factorization.

65531071745743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610744456.

The product of its (nonzero) digits is 37044000, while the sum is 58.

The spelling of 65531071745743 in words is "sixty-five trillion, five hundred thirty-one billion, seventy-one million, seven hundred forty-five thousand, seven hundred forty-three".