65211736397 has 2 divisors, whose sum is σ = 65211736398. Its totient is φ = 65211736396.

The previous prime is 65211736379. The next prime is 65211736423. The reversal of 65211736397 is 79363711256.

Together with previous prime (65211736379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61540709476 + 3671026921 = 248074^2 + 60589^2 .

It is a cyclic number.

It is not a de Polignac number, because 65211736397 - 2⁶ = 65211736333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65211736367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32605868198 + 32605868199.

It is an arithmetic number, because the mean of its divisors is an integer number (32605868199).

Almost surely, 2^65211736397 is an apocalyptic number.

It is an amenable number.

65211736397 is a deficient number, since it is larger than the sum of its proper divisors (1).

65211736397 is an equidigital number, since it uses as much as digits as its factorization.

65211736397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 50.

The spelling of 65211736397 in words is "sixty-five billion, two hundred eleven million, seven hundred thirty-six thousand, three hundred ninety-seven".