64004035391 has 2 divisors, whose sum is σ = 64004035392. Its totient is φ = 64004035390.

The previous prime is 64004035357. The next prime is 64004035507. The reversal of 64004035391 is 19353040046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64004035391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64004035321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32002017695 + 32002017696.

It is an arithmetic number, because the mean of its divisors is an integer number (32002017696).

Almost surely, 2^64004035391 is an apocalyptic number.

64004035391 is a deficient number, since it is larger than the sum of its proper divisors (1).

64004035391 is an equidigital number, since it uses as much as digits as its factorization.

64004035391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 64004035391 in words is "sixty-four billion, four million, thirty-five thousand, three hundred ninety-one".