2605840811 has 8 divisors (see below), whose sum is σ = 3074171904. Its totient is φ = 2161526760.

The previous prime is 2605840799. The next prime is 2605840819. The reversal of 2605840811 is 1180485062.

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 2605840811 - 2¹⁰ = 2605839787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2605840819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6004025 + ... + 6004458.

It is an arithmetic number, because the mean of its divisors is an integer number (384271488).

Almost surely, 2^2605840811 is an apocalyptic number.

2605840811 is a deficient number, since it is larger than the sum of its proper divisors (468331093).

2605840811 is a wasteful number, since it uses less digits than its factorization.

2605840811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12008521.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 2605840811 is about 51047.4368700330. The cubic root of 2605840811 is about 1376.0977787002.

The spelling of 2605840811 in words is "two billion, six hundred five million, eight hundred forty thousand, eight hundred eleven".