561428571547520 has 256 divisors, whose sum is σ = 1393418819819520. Its totient is φ = 216137784360960.

The previous prime is 561428571547469. The next prime is 561428571547541. The reversal of 561428571547520 is 25745175824165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1013203340 + ... + 1013757300.

It is an arithmetic number, because the mean of its divisors is an integer number (5443042264920).

Almost surely, 2^{561428571547520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561428571547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696709409909760).

561428571547520 is an abundant number, since it is smaller than the sum of its proper divisors (831990248272000).

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

561428571547520 is a wasteful number, since it uses less digits than its factorization.

561428571547520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554481 (or 554469 counting only the distinct ones).

The product of its (nonzero) digits is 94080000, while the sum is 62.

The spelling of 561428571547520 in words is "five hundred sixty-one trillion, four hundred twenty-eight billion, five hundred seventy-one million, five hundred forty-seven thousand, five hundred twenty".