64443234407 has 2 divisors, whose sum is σ = 64443234408. Its totient is φ = 64443234406.

The previous prime is 64443234371. The next prime is 64443234467. The reversal of 64443234407 is 70443234446.

64443234407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64443234407 - 2¹⁶ = 64443168871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64443234467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221617203 + 32221617204.

It is an arithmetic number, because the mean of its divisors is an integer number (32221617204).

Almost surely, 2^64443234407 is an apocalyptic number.

64443234407 is a deficient number, since it is larger than the sum of its proper divisors (1).

64443234407 is an equidigital number, since it uses as much as digits as its factorization.

64443234407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 41.

The spelling of 64443234407 in words is "sixty-four billion, four hundred forty-three million, two hundred thirty-four thousand, four hundred seven".