53168259521 has 4 divisors (see below), whose sum is σ = 57258125652. Its totient is φ = 49078393392.

The previous prime is 53168259503. The next prime is 53168259527. The reversal of 53168259521 is 12595286135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12595286135 = 5 ⋅2519057227.

It can be written as a sum of positive squares in 2 ways, for example, as 10633734400 + 42534525121 = 103120^2 + 206239^2 .

It is a cyclic number.

It is not a de Polignac number, because 53168259521 - 2⁶ = 53168259457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53168259527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044933046 + ... + 2044933071.

It is an arithmetic number, because the mean of its divisors is an integer number (14314531413).

Almost surely, 2^53168259521 is an apocalyptic number.

It is an amenable number.

53168259521 is a deficient number, since it is larger than the sum of its proper divisors (4089866131).

53168259521 is a wasteful number, since it uses less digits than its factorization.

53168259521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089866130.

The product of its digits is 648000, while the sum is 47.

The spelling of 53168259521 in words is "fifty-three billion, one hundred sixty-eight million, two hundred fifty-nine thousand, five hundred twenty-one".