2541564561 has 8 divisors (see below), whose sum is σ = 3536089920. Its totient is φ = 1620707792.

The previous prime is 2541564559. The next prime is 2541564577. The reversal of 2541564561 is 1654651452.

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 2541564561 - 2¹ = 2541564559 is a prime.

It is a super-2 number, since 2×2541564561² = 12919100835462245442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2541564511) 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, 18417066 + ... + 18417203.

It is an arithmetic number, because the mean of its divisors is an integer number (442011240).

Almost surely, 2^2541564561 is an apocalyptic number.

It is an amenable number.

2541564561 is a deficient number, since it is larger than the sum of its proper divisors (994525359).

2541564561 is a wasteful number, since it uses less digits than its factorization.

2541564561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36834295.

The product of its digits is 144000, while the sum is 39.

The square root of 2541564561 is about 50413.9322112449. The cubic root of 2541564561 is about 1364.6890767626.

The spelling of 2541564561 in words is "two billion, five hundred forty-one million, five hundred sixty-four thousand, five hundred sixty-one".