65385236736 has 216 divisors, whose sum is σ = 192734156160. Its totient is φ = 21310967808.

The previous prime is 65385236729. The next prime is 65385236767. The reversal of 65385236736 is 63763258356.

It is a happy number.

65385236736 is a `hidden beast` number, since 6 + 53 + 8 + 523 + 67 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44814375 + ... + 44815833.

It is an arithmetic number, because the mean of its divisors is an integer number (892287760).

Almost surely, 2^65385236736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65385236736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96367078080).

65385236736 is an abundant number, since it is smaller than the sum of its proper divisors (127348919424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65385236736 is a wasteful number, since it uses less digits than its factorization.

65385236736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901 (or 1884 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 54.

The spelling of 65385236736 in words is "sixty-five billion, three hundred eighty-five million, two hundred thirty-six thousand, seven hundred thirty-six".