2805240561 has 8 divisors (see below), whose sum is σ = 3860976384. Its totient is φ = 1809832560.

The previous prime is 2805240553. The next prime is 2805240577. The reversal of 2805240561 is 1650425082.

2805240561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2805240561 - 2³ = 2805240553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2805247561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15081846 + ... + 15082031.

It is an arithmetic number, because the mean of its divisors is an integer number (482622048).

Almost surely, 2^2805240561 is an apocalyptic number.

It is an amenable number.

2805240561 is a deficient number, since it is larger than the sum of its proper divisors (1055735823).

2805240561 is a wasteful number, since it uses less digits than its factorization.

2805240561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30163911.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 2805240561 is about 52964.5217197324. The cubic root of 2805240561 is about 1410.3385269355.

The spelling of 2805240561 in words is "two billion, eight hundred five million, two hundred forty thousand, five hundred sixty-one".