521286130540 has 72 divisors (see below), whose sum is σ = 1286555901120. Its totient is φ = 176884098048.

The previous prime is 521286130523. The next prime is 521286130583. The reversal of 521286130540 is 45031682125.

It is a self number, because there is not a number n which added to its sum of digits gives 521286130540.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2646820 + ... + 2836939.

It is an arithmetic number, because the mean of its divisors is an integer number (17868831960).

Almost surely, 2^521286130540 is an apocalyptic number.

It is an amenable number.

521286130540 is an abundant number, since it is smaller than the sum of its proper divisors (765269770580).

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

521286130540 is a wasteful number, since it uses less digits than its factorization.

521286130540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483879 (or 5483870 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 521286130540 in words is "five hundred twenty-one billion, two hundred eighty-six million, one hundred thirty thousand, five hundred forty".