65280033073261 has 2 divisors, whose sum is σ = 65280033073262. Its totient is φ = 65280033073260.

The previous prime is 65280033073207. The next prime is 65280033073303. The reversal of 65280033073261 is 16237033008256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61931155033225 + 3348878040036 = 7869635^2 + 1829994^2 .

It is a cyclic number.

It is not a de Polignac number, because 65280033073261 - 2²¹ = 65280030976109 is a prime.

It is a super-2 number, since 2×65280033073261² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65280033073861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640016536630 + 32640016536631.

It is an arithmetic number, because the mean of its divisors is an integer number (32640016536631).

Almost surely, 2^{65280033073261} is an apocalyptic number.

It is an amenable number.

65280033073261 is a deficient number, since it is larger than the sum of its proper divisors (1).

65280033073261 is an equidigital number, since it uses as much as digits as its factorization.

65280033073261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 65280033073261 in words is "sixty-five trillion, two hundred eighty billion, thirty-three million, seventy-three thousand, two hundred sixty-one".