521284840404 has 48 divisors (see below), whose sum is σ = 1228294704000. Its totient is φ = 172052979840.

The previous prime is 521284840361. The next prime is 521284840411. The reversal of 521284840404 is 404048482125.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12028134 + ... + 12071394.

It is an arithmetic number, because the mean of its divisors is an integer number (25589473000).

Almost surely, 2^521284840404 is an apocalyptic number.

It is an amenable number.

521284840404 is an abundant number, since it is smaller than the sum of its proper divisors (707009863596).

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

521284840404 is a wasteful number, since it uses less digits than its factorization.

521284840404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53120 (or 53118 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 42.

The spelling of 521284840404 in words is "five hundred twenty-one billion, two hundred eighty-four million, eight hundred forty thousand, four hundred four".