64201662709 has 2 divisors, whose sum is σ = 64201662710. Its totient is φ = 64201662708.

The previous prime is 64201662619. The next prime is 64201662751. The reversal of 64201662709 is 90726610246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44886778225 + 19314884484 = 211865^2 + 138978^2 .

It is a cyclic number.

It is not a de Polignac number, because 64201662709 - 2¹⁵ = 64201629941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64201666709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32100831354 + 32100831355.

It is an arithmetic number, because the mean of its divisors is an integer number (32100831355).

Almost surely, 2^64201662709 is an apocalyptic number.

It is an amenable number.

64201662709 is a deficient number, since it is larger than the sum of its proper divisors (1).

64201662709 is an equidigital number, since it uses as much as digits as its factorization.

64201662709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 64201662709 in words is "sixty-four billion, two hundred one million, six hundred sixty-two thousand, seven hundred nine".