65165618112 has 448 divisors, whose sum is σ = 210746425344. Its totient is φ = 17371791360.

The previous prime is 65165618071. The next prime is 65165618131. The reversal of 65165618112 is 21181656156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 308841687 + ... + 308841897.

It is an arithmetic number, because the mean of its divisors is an integer number (470416128).

Almost surely, 2^65165618112 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 65165618112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105373212672).

65165618112 is an abundant number, since it is smaller than the sum of its proper divisors (145580807232).

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

65165618112 is a wasteful number, since it uses less digits than its factorization.

65165618112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 446 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The spelling of 65165618112 in words is "sixty-five billion, one hundred sixty-five million, six hundred eighteen thousand, one hundred twelve".