65522170000 has 200 divisors, whose sum is σ = 189185141376. Its totient is φ = 21487488000.

The previous prime is 65522169967. The next prime is 65522170001. The reversal of 65522170000 is 7122556.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (65522170001) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 1589652 + ... + 1630348.

Almost surely, 2^65522170000 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 65522170000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94592570688).

65522170000 is an abundant number, since it is smaller than the sum of its proper divisors (123662971376).

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

65522170000 is a wasteful number, since it uses less digits than its factorization.

65522170000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40755 (or 40734 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

Adding to 65522170000 its reverse (7122556), we get a palindrome (65529292556).

The spelling of 65522170000 in words is "sixty-five billion, five hundred twenty-two million, one hundred seventy thousand".