521055709140 has 48 divisors (see below), whose sum is σ = 1459060545600. Its totient is φ = 138938231040.

The previous prime is 521055709087. The next prime is 521055709177. The reversal of 521055709140 is 41907550125.

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, 552811 + ... + 1160909.

It is an arithmetic number, because the mean of its divisors is an integer number (30397094700).

Almost surely, 2^521055709140 is an apocalyptic number.

It is an amenable number.

521055709140 is an abundant number, since it is smaller than the sum of its proper divisors (938004836460).

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

521055709140 is a wasteful number, since it uses less digits than its factorization.

521055709140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622392 (or 622390 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 521055709140 in words is "five hundred twenty-one billion, fifty-five million, seven hundred nine thousand, one hundred forty".