65539231488 has 144 divisors (see below), whose sum is σ = 197097196800. Its totient is φ = 21475998720.

The previous prime is 65539231411. The next prime is 65539231489. The reversal of 65539231488 is 88413293556.

65539231488 is a `hidden beast` number, since 6 + 5 + 539 + 23 + 1 + 4 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65539231489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327453 + ... + 488163.

Almost surely, 2^65539231488 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 65539231488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98548598400).

65539231488 is an abundant number, since it is smaller than the sum of its proper divisors (131557965312).

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

65539231488 is a wasteful number, since it uses less digits than its factorization.

65539231488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160795 (or 160775 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 65539231488 in words is "sixty-five billion, five hundred thirty-nine million, two hundred thirty-one thousand, four hundred eighty-eight".