64243363871 has 2 divisors, whose sum is σ = 64243363872. Its totient is φ = 64243363870.

The previous prime is 64243363829. The next prime is 64243363883. The reversal of 64243363871 is 17836334246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64243363871 - 2²⁶ = 64176255007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64243363771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32121681935 + 32121681936.

It is an arithmetic number, because the mean of its divisors is an integer number (32121681936).

Almost surely, 2^64243363871 is an apocalyptic number.

64243363871 is a deficient number, since it is larger than the sum of its proper divisors (1).

64243363871 is an equidigital number, since it uses as much as digits as its factorization.

64243363871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 47.

The spelling of 64243363871 in words is "sixty-four billion, two hundred forty-three million, three hundred sixty-three thousand, eight hundred seventy-one".