65393139188 has 36 divisors (see below), whose sum is σ = 123944205420. Its totient is φ = 30175082496.

The previous prime is 65393139151. The next prime is 65393139191. The reversal of 65393139188 is 88193139356.

It can be written as a sum of positive squares in 6 ways, for example, as 8354325604 + 57038813584 = 91402^2 + 238828^2 .

It is a super-2 number, since 2×65393139188² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5056106 + ... + 5069022.

It is an arithmetic number, because the mean of its divisors is an integer number (3442894595).

Almost surely, 2^65393139188 is an apocalyptic number.

It is an amenable number.

65393139188 is a deficient number, since it is larger than the sum of its proper divisors (58551066232).

65393139188 is a wasteful number, since it uses less digits than its factorization.

65393139188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20436 (or 20421 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The spelling of 65393139188 in words is "sixty-five billion, three hundred ninety-three million, one hundred thirty-nine thousand, one hundred eighty-eight".