2808725561 has 8 divisors (see below), whose sum is σ = 2851559424. Its totient is φ = 2766106000.

The previous prime is 2808725551. The next prime is 2808725573. The reversal of 2808725561 is 1655278082.

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 2808725561 - 2¹⁰ = 2808724537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808725531) 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, 27065 + ... + 79686.

It is an arithmetic number, because the mean of its divisors is an integer number (356444928).

Almost surely, 2^2808725561 is an apocalyptic number.

It is an amenable number.

2808725561 is a deficient number, since it is larger than the sum of its proper divisors (42833863).

2808725561 is a wasteful number, since it uses less digits than its factorization.

2808725561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107151.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 2808725561 is about 52997.4108895897. The cubic root of 2808725561 is about 1410.9223147569.

The spelling of 2808725561 in words is "two billion, eight hundred eight million, seven hundred twenty-five thousand, five hundred sixty-one".