65333523280 has 20 divisors (see below), whose sum is σ = 151900441812. Its totient is φ = 26133409280.

The previous prime is 65333523251. The next prime is 65333523313. The reversal of 65333523280 is 8232533356.

It can be written as a sum of positive squares in 2 ways, for example, as 45927918864 + 19405604416 = 214308^2 + 139304^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408334441 + ... + 408334600.

Almost surely, 2^65333523280 is an apocalyptic number.

It is an amenable number.

65333523280 is an abundant number, since it is smaller than the sum of its proper divisors (86566918532).

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

65333523280 is a wasteful number, since it uses less digits than its factorization.

65333523280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816669054 (or 816669048 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 65333523280 in words is "sixty-five billion, three hundred thirty-three million, five hundred twenty-three thousand, two hundred eighty".