65393910388 has 12 divisors (see below), whose sum is σ = 115489246180. Its totient is φ = 32396982912.

The previous prime is 65393910377. The next prime is 65393910389. The reversal of 65393910388 is 88301939356.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30144598884 + 35249311504 = 173622^2 + 187748^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65393910389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74992581 + ... + 74993452.

Almost surely, 2^65393910388 is an apocalyptic number.

It is an amenable number.

65393910388 is a deficient number, since it is larger than the sum of its proper divisors (50095335792).

65393910388 is a wasteful number, since it uses less digits than its factorization.

65393910388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149986146 (or 149986144 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 65393910388 in words is "sixty-five billion, three hundred ninety-three million, nine hundred ten thousand, three hundred eighty-eight".