571520055561 has 64 divisors (see below), whose sum is σ = 964918929408. Its totient is φ = 292893055488.

The previous prime is 571520055553. The next prime is 571520055581. The reversal of 571520055561 is 165550025175.

It is not a de Polignac number, because 571520055561 - 2³ = 571520055553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (571520055521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1121230 + ... + 1549256.

It is an arithmetic number, because the mean of its divisors is an integer number (15076858272).

Almost surely, 2^571520055561 is an apocalyptic number.

It is an amenable number.

571520055561 is a deficient number, since it is larger than the sum of its proper divisors (393398873847).

571520055561 is a wasteful number, since it uses less digits than its factorization.

571520055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428190.

The product of its (nonzero) digits is 262500, while the sum is 42.

The spelling of 571520055561 in words is "five hundred seventy-one billion, five hundred twenty million, fifty-five thousand, five hundred sixty-one".