521064316337 has 4 divisors (see below), whose sum is σ = 526223369076. Its totient is φ = 515905263600.

The previous prime is 521064316327. The next prime is 521064316349. The reversal of 521064316337 is 733613460125.

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 473026197361 + 48038118976 = 687769^2 + 219176^2 .

It is a cyclic number.

It is not a de Polignac number, because 521064316337 - 2¹⁴ = 521064299953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521064316294 and 521064316303.

It is not an unprimeable number, because it can be changed into a prime (521064316327) 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 3 ways as a sum of consecutive naturals, for example, 2579526218 + ... + 2579526419.

It is an arithmetic number, because the mean of its divisors is an integer number (131555842269).

Almost surely, 2^521064316337 is an apocalyptic number.

It is an amenable number.

521064316337 is a deficient number, since it is larger than the sum of its proper divisors (5159052739).

521064316337 is a wasteful number, since it uses less digits than its factorization.

521064316337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159052738.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 521064316337 in words is "five hundred twenty-one billion, sixty-four million, three hundred sixteen thousand, three hundred thirty-seven".