64668148841 has 4 divisors (see below), whose sum is σ = 64898284884. Its totient is φ = 64438012800.

The previous prime is 64668148793. The next prime is 64668148849. The reversal of 64668148841 is 14884186646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37337446441 + 27330702400 = 193229^2 + 165320^2 .

It is a cyclic number.

It is not a de Polignac number, because 64668148841 - 2³⁰ = 63594407017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64668148849) 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 3 ways as a sum of consecutive naturals, for example, 115067600 + ... + 115068161.

It is an arithmetic number, because the mean of its divisors is an integer number (16224571221).

Almost surely, 2^64668148841 is an apocalyptic number.

It is an amenable number.

64668148841 is a deficient number, since it is larger than the sum of its proper divisors (230136043).

64668148841 is a wasteful number, since it uses less digits than its factorization.

64668148841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230136042.

The product of its digits is 7077888, while the sum is 56.

The spelling of 64668148841 in words is "sixty-four billion, six hundred sixty-eight million, one hundred forty-eight thousand, eight hundred forty-one".