53281666523567 has 4 divisors (see below), whose sum is σ = 53310766288656. Its totient is φ = 53252566758480.

The previous prime is 53281666523461. The next prime is 53281666523593. The reversal of 53281666523567 is 76532566618235.

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

It is a cyclic number.

It is not a de Polignac number, because 53281666523567 - 2¹⁸ = 53281666261423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53281666723567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14549879798 + ... + 14549883459.

It is an arithmetic number, because the mean of its divisors is an integer number (13327691572164).

Almost surely, 2^{53281666523567} is an apocalyptic number.

53281666523567 is a deficient number, since it is larger than the sum of its proper divisors (29099765089).

53281666523567 is a wasteful number, since it uses less digits than its factorization.

53281666523567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29099765088.

The product of its digits is 326592000, while the sum is 65.

The spelling of 53281666523567 in words is "fifty-three trillion, two hundred eighty-one billion, six hundred sixty-six million, five hundred twenty-three thousand, five hundred sixty-seven".