65020321621253 has 2 divisors, whose sum is σ = 65020321621254. Its totient is φ = 65020321621252.

The previous prime is 65020321621243. The next prime is 65020321621327. The reversal of 65020321621253 is 35212612302056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61908209303329 + 3112112317924 = 7868177^2 + 1764118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65020321621253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65020321621243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510160810626 + 32510160810627.

It is an arithmetic number, because the mean of its divisors is an integer number (32510160810627).

Almost surely, 2^{65020321621253} is an apocalyptic number.

It is an amenable number.

65020321621253 is a deficient number, since it is larger than the sum of its proper divisors (1).

65020321621253 is an equidigital number, since it uses as much as digits as its factorization.

65020321621253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 65020321621253 in words is "sixty-five trillion, twenty billion, three hundred twenty-one million, six hundred twenty-one thousand, two hundred fifty-three".