64587381502109 has 2 divisors, whose sum is σ = 64587381502110. Its totient is φ = 64587381502108.

The previous prime is 64587381502099. The next prime is 64587381502121. The reversal of 64587381502109 is 90120518378546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63237532553209 + 1349848948900 = 7952203^2 + 1161830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64587381502109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64587381502909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32293690751054 + 32293690751055.

It is an arithmetic number, because the mean of its divisors is an integer number (32293690751055).

It is a 1-persistent number, because it is pandigital, but 2⋅64587381502109 = 129174763004218 is not.

Almost surely, 2^{64587381502109} is an apocalyptic number.

It is an amenable number.

64587381502109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64587381502109 is an equidigital number, since it uses as much as digits as its factorization.

64587381502109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 64587381502109 in words is "sixty-four trillion, five hundred eighty-seven billion, three hundred eighty-one million, five hundred two thousand, one hundred nine".