2520565561 has 8 divisors (see below), whose sum is σ = 2631124224. Its totient is φ = 2410087680.

The previous prime is 2520565559. The next prime is 2520565583. The reversal of 2520565561 is 1655650252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2520565561 - 2¹ = 2520565559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2520565561.

It is not an unprimeable number, because it can be changed into a prime (2520565511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48601 + ... + 86041.

It is an arithmetic number, because the mean of its divisors is an integer number (328890528).

Almost surely, 2^2520565561 is an apocalyptic number.

It is an amenable number.

2520565561 is a deficient number, since it is larger than the sum of its proper divisors (110558663).

2520565561 is a wasteful number, since it uses less digits than its factorization.

2520565561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40391.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 2520565561 is about 50205.2343984171. The cubic root of 2520565561 is about 1360.9202179341.

The spelling of 2520565561 in words is "two billion, five hundred twenty million, five hundred sixty-five thousand, five hundred sixty-one".