65616070210609 has 2 divisors, whose sum is σ = 65616070210610. Its totient is φ = 65616070210608.

The previous prime is 65616070210583. The next prime is 65616070210727. The reversal of 65616070210609 is 90601207061656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65469993370609 + 146076840000 = 8091353^2 + 382200^2 .

It is a cyclic number.

It is not a de Polignac number, because 65616070210609 - 2¹⁷ = 65616070079537 is a prime.

It is not a weakly prime, because it can be changed into another prime (65616070210409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808035105304 + 32808035105305.

It is an arithmetic number, because the mean of its divisors is an integer number (32808035105305).

Almost surely, 2^{65616070210609} is an apocalyptic number.

It is an amenable number.

65616070210609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65616070210609 is an equidigital number, since it uses as much as digits as its factorization.

65616070210609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 65616070210609 in words is "sixty-five trillion, six hundred sixteen billion, seventy million, two hundred ten thousand, six hundred nine".