65393910447 has 4 divisors (see below), whose sum is σ = 87191880600. Its totient is φ = 43595940296.

The previous prime is 65393910443. The next prime is 65393910457. The reversal of 65393910447 is 74401939356.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65393910447 - 2² = 65393910443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65393910447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65393910443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10898985072 + ... + 10898985077.

It is an arithmetic number, because the mean of its divisors is an integer number (21797970150).

Almost surely, 2^65393910447 is an apocalyptic number.

65393910447 is a deficient number, since it is larger than the sum of its proper divisors (21797970153).

65393910447 is a wasteful number, since it uses less digits than its factorization.

65393910447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21797970152.

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 65393910447 in words is "sixty-five billion, three hundred ninety-three million, nine hundred ten thousand, four hundred forty-seven".