65490210807257 has 2 divisors, whose sum is σ = 65490210807258. Its totient is φ = 65490210807256.

The previous prime is 65490210807253. The next prime is 65490210807379. The reversal of 65490210807257 is 75270801209456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65487520414096 + 2690393161 = 8092436^2 + 51869^2 .

It is a cyclic number.

It is not a de Polignac number, because 65490210807257 - 2² = 65490210807253 is a prime.

It is not a weakly prime, because it can be changed into another prime (65490210807253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32745105403628 + 32745105403629.

It is an arithmetic number, because the mean of its divisors is an integer number (32745105403629).

Almost surely, 2^{65490210807257} is an apocalyptic number.

It is an amenable number.

65490210807257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65490210807257 is an equidigital number, since it uses as much as digits as its factorization.

65490210807257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 65490210807257 in words is "sixty-five trillion, four hundred ninety billion, two hundred ten million, eight hundred seven thousand, two hundred fifty-seven".