521853536203340 has 24 divisors (see below), whose sum is σ = 1195519010211792. Its totient is φ = 189764922255680.

The previous prime is 521853536203297. The next prime is 521853536203343. The reversal of 521853536203340 is 43302635358125.

It is a happy number.

It is a super-2 number, since 2×521853536203340² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521853536203343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186030763879 + ... + 1186030764318.

It is an arithmetic number, because the mean of its divisors is an integer number (49813292092158).

Almost surely, 2^{521853536203340} is an apocalyptic number.

It is an amenable number.

521853536203340 is an abundant number, since it is smaller than the sum of its proper divisors (673665474008452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521853536203340 is a wasteful number, since it uses less digits than its factorization.

521853536203340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372061528217 (or 2372061528215 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 521853536203340 in words is "five hundred twenty-one trillion, eight hundred fifty-three billion, five hundred thirty-six million, two hundred three thousand, three hundred forty".