64612216242 has 162 divisors, whose sum is σ = 169639128477. Its totient is φ = 18402397776.

The previous prime is 64612216241. The next prime is 64612216243. The reversal of 64612216242 is 24261221646.

64612216242 is a `hidden beast` number, since 6 + 4 + 6 + 1 + 2 + 21 + 624 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (64612216241) and next prime (64612216243).

It can be written as a sum of positive squares in 2 ways, for example, as 47158899921 + 17453316321 = 217161^2 + 132111^2 .

It is a tau number, because it is divible by the number of its divisors (162).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=179739.

It is a junction number, because it is equal to n+sod(n) for n = 64612216197 and 64612216206.

It is not an unprimeable number, because it can be changed into a prime (64612216241) 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 80 ways as a sum of consecutive naturals, for example, 203823868 + ... + 203824184.

Almost surely, 2^64612216242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64612216242

64612216242 is an abundant number, since it is smaller than the sum of its proper divisors (105026912235).

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

64612216242 is an frugal number, since it uses more digits than its factorization.

64612216242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 329 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

Adding to 64612216242 its reverse (24261221646), we get a palindrome (88873437888).

The spelling of 64612216242 in words is "sixty-four billion, six hundred twelve million, two hundred sixteen thousand, two hundred forty-two".