2805262561 has 2 divisors, whose sum is σ = 2805262562. Its totient is φ = 2805262560.

The previous prime is 2805262529. The next prime is 2805262573. The reversal of 2805262561 is 1652625082.

2805262561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2686452561 + 118810000 = 51831^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805262561 - 2⁵ = 2805262529 is a prime.

It is a super-2 number, since 2×2805262561² = 15738996072296557442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2805262561.

It is not a weakly prime, because it can be changed into another prime (2805262511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402631280 + 1402631281.

It is an arithmetic number, because the mean of its divisors is an integer number (1402631281).

Almost surely, 2^2805262561 is an apocalyptic number.

It is an amenable number.

2805262561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805262561 is an equidigital number, since it uses as much as digits as its factorization.

2805262561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 2805262561 is about 52964.7294055204. The cubic root of 2805262561 is about 1410.3422137692.

The spelling of 2805262561 in words is "two billion, eight hundred five million, two hundred sixty-two thousand, five hundred sixty-one".