65620161200 has 120 divisors (see below), whose sum is σ = 172744747200. Its totient is φ = 23756396800.

The previous prime is 65620161181. The next prime is 65620161203. The reversal of 65620161200 is 216102656.

It is not an unprimeable number, because it can be changed into a prime (65620161203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 965951 + ... + 1031649.

It is an arithmetic number, because the mean of its divisors is an integer number (1439539560).

Almost surely, 2^65620161200 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 65620161200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86372373600).

65620161200 is an abundant number, since it is smaller than the sum of its proper divisors (107124586000).

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

65620161200 is a wasteful number, since it uses less digits than its factorization.

65620161200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65955 (or 65944 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 65620161200 its reverse (216102656), we get a palindrome (65836263856).

The spelling of 65620161200 in words is "sixty-five billion, six hundred twenty million, one hundred sixty-one thousand, two hundred".