64161336163650 has 384 divisors, whose sum is σ = 176534681057280. Its totient is φ = 15292021248000.

The previous prime is 64161336163601. The next prime is 64161336163651. The reversal of 64161336163650 is 5636163316146.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64161336163593 and 64161336163602.

It is not an unprimeable number, because it can be changed into a prime (64161336163651) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 42974772304 + ... + 42974773796.

It is an arithmetic number, because the mean of its divisors is an integer number (459725731920).

Almost surely, 2^{64161336163650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64161336163650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88267340528640).

64161336163650 is an abundant number, since it is smaller than the sum of its proper divisors (112373344893630).

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

64161336163650 is a wasteful number, since it uses less digits than its factorization.

64161336163650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922 (or 2917 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 51.

Adding to 64161336163650 its reverse (5636163316146), we get a palindrome (69797499479796).

The spelling of 64161336163650 in words is "sixty-four trillion, one hundred sixty-one billion, three hundred thirty-six million, one hundred sixty-three thousand, six hundred fifty".