64224706563971 has 2 divisors, whose sum is σ = 64224706563972. Its totient is φ = 64224706563970.

The previous prime is 64224706563947. The next prime is 64224706563973. The reversal of 64224706563971 is 17936560742246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64224706563971 - 2¹⁸ = 64224706301827 is a prime.

It is a Sophie Germain prime.

Together with 64224706563973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64224706563973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32112353281985 + 32112353281986.

It is an arithmetic number, because the mean of its divisors is an integer number (32112353281986).

Almost surely, 2^{64224706563971} is an apocalyptic number.

64224706563971 is a deficient number, since it is larger than the sum of its proper divisors (1).

64224706563971 is an equidigital number, since it uses as much as digits as its factorization.

64224706563971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91445760, while the sum is 62.

The spelling of 64224706563971 in words is "sixty-four trillion, two hundred twenty-four billion, seven hundred six million, five hundred sixty-three thousand, nine hundred seventy-one".