521584493493 has 32 divisors (see below), whose sum is σ = 836685168640. Its totient is φ = 282341816640.

The previous prime is 521584493483. The next prime is 521584493561. The reversal of 521584493493 is 394394485125.

It is not a de Polignac number, because 521584493493 - 2⁵ = 521584493461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521584493483) 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 31 ways as a sum of consecutive naturals, for example, 7061871 + ... + 7135347.

It is an arithmetic number, because the mean of its divisors is an integer number (26146411520).

Almost surely, 2^521584493493 is an apocalyptic number.

It is an amenable number.

521584493493 is a deficient number, since it is larger than the sum of its proper divisors (315100675147).

521584493493 is a wasteful number, since it uses less digits than its factorization.

521584493493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91297.

The product of its digits is 18662400, while the sum is 57.

The spelling of 521584493493 in words is "five hundred twenty-one billion, five hundred eighty-four million, four hundred ninety-three thousand, four hundred ninety-three".