65612063281 has 2 divisors, whose sum is σ = 65612063282. Its totient is φ = 65612063280.

The previous prime is 65612063197. The next prime is 65612063299. The reversal of 65612063281 is 18236021656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63260298256 + 2351765025 = 251516^2 + 48495^2 .

It is a cyclic number.

It is not a de Polignac number, because 65612063281 - 2¹⁵ = 65612030513 is a prime.

It is a super-2 number, since 2×65612063281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65612063381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32806031640 + 32806031641.

It is an arithmetic number, because the mean of its divisors is an integer number (32806031641).

Almost surely, 2^65612063281 is an apocalyptic number.

It is an amenable number.

65612063281 is a deficient number, since it is larger than the sum of its proper divisors (1).

65612063281 is an equidigital number, since it uses as much as digits as its factorization.

65612063281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 65612063281 in words is "sixty-five billion, six hundred twelve million, sixty-three thousand, two hundred eighty-one".