65138851135 has 4 divisors (see below), whose sum is σ = 78166621368. Its totient is φ = 52111080904.

The previous prime is 65138851133. The next prime is 65138851157. The reversal of 65138851135 is 53115883156.

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 65138851135 - 2¹ = 65138851133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65138851133) 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, 6513885109 + ... + 6513885118.

It is an arithmetic number, because the mean of its divisors is an integer number (19541655342).

Almost surely, 2^65138851135 is an apocalyptic number.

65138851135 is a deficient number, since it is larger than the sum of its proper divisors (13027770233).

65138851135 is a wasteful number, since it uses less digits than its factorization.

65138851135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13027770232.

The product of its digits is 432000, while the sum is 46.

The spelling of 65138851135 in words is "sixty-five billion, one hundred thirty-eight million, eight hundred fifty-one thousand, one hundred thirty-five".