64320690851 has 2 divisors, whose sum is σ = 64320690852. Its totient is φ = 64320690850.

The previous prime is 64320690827. The next prime is 64320690869. The reversal of 64320690851 is 15809602346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64320690851 - 2¹⁰ = 64320689827 is a prime.

It is not a weakly prime, because it can be changed into another prime (64320690451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160345425 + 32160345426.

It is an arithmetic number, because the mean of its divisors is an integer number (32160345426).

Almost surely, 2^64320690851 is an apocalyptic number.

64320690851 is a deficient number, since it is larger than the sum of its proper divisors (1).

64320690851 is an equidigital number, since it uses as much as digits as its factorization.

64320690851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 64320690851 in words is "sixty-four billion, three hundred twenty million, six hundred ninety thousand, eight hundred fifty-one".