64610842619569 has 9 divisors (see below), whose sum is σ = 64657102749163. Its totient is φ = 64564615581232.

The previous prime is 64610842619549. The next prime is 64610842619573. The reversal of 64610842619569 is 96591624801646.

The square root of 64610842619569 is 8038087.

It is a perfect power (a square), and thus also a powerful number.

64610842619569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1342944911025 + 63267897708544 = 1158855^2 + 7954112^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64610842619569 is a prime.

It is a super-2 number, since 2×64610842619569² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64610842619549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19235140512 + ... + 19235143870.

Almost surely, 2^{64610842619569} is an apocalyptic number.

64610842619569 is the 8038087-th square number.

64610842619569 is the 4019044-th centered octagonal number.

It is an amenable number.

64610842619569 is a deficient number, since it is larger than the sum of its proper divisors (46260129594).

64610842619569 is an frugal number, since it uses more digits than its factorization.

64610842619569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504 (or 5752 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 67.

The spelling of 64610842619569 in words is "sixty-four trillion, six hundred ten billion, eight hundred forty-two million, six hundred nineteen thousand, five hundred sixty-nine".