65623320161312 has 96 divisors (see below), whose sum is σ = 134190825237504. Its totient is φ = 31567530470400.

The previous prime is 65623320161293. The next prime is 65623320161317. The reversal of 65623320161312 is 21316102332656.

It is a super-2 number, since 2×65623320161312² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65623320161312.

It is not an unprimeable number, because it can be changed into a prime (65623320161317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148496393 + ... + 148937655.

It is an arithmetic number, because the mean of its divisors is an integer number (1397821096224).

Almost surely, 2^{65623320161312} 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 65623320161312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67095412618752).

65623320161312 is an abundant number, since it is smaller than the sum of its proper divisors (68567505076192).

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

65623320161312 is a wasteful number, since it uses less digits than its factorization.

65623320161312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443002 (or 442994 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 65623320161312 its reverse (21316102332656), we get a palindrome (86939422493968).

The spelling of 65623320161312 in words is "sixty-five trillion, six hundred twenty-three billion, three hundred twenty million, one hundred sixty-one thousand, three hundred twelve".