65321133600 has 144 divisors (see below), whose sum is σ = 223810987680. Its totient is φ = 16502169600.

The previous prime is 65321133599. The next prime is 65321133637. The reversal of 65321133600 is 633112356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670641 + ... + 761840.

It is an arithmetic number, because the mean of its divisors is an integer number (1554242970).

Almost surely, 2^65321133600 is an apocalyptic number.

65321133600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65321133600 is an abundant number, since it is smaller than the sum of its proper divisors (158489854080).

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

65321133600 is a wasteful number, since it uses less digits than its factorization.

65321133600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432523 (or 1432510 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 65321133600 its reverse (633112356), we get a palindrome (65954245956).

The spelling of 65321133600 in words is "sixty-five billion, three hundred twenty-one million, one hundred thirty-three thousand, six hundred".