2845722805 has 4 divisors (see below), whose sum is σ = 3414867372. Its totient is φ = 2276578240.

The previous prime is 2845722709. The next prime is 2845722809. The reversal of 2845722805 is 5082275482.

2845722805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5082275482 = 2 ⋅2541137741.

It can be written as a sum of positive squares in 2 ways, for example, as 2014034884 + 831687921 = 44878^2 + 28839^2 .

It is not a de Polignac number, because 2845722805 - 2²⁹ = 2308851893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2845722809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284572276 + ... + 284572285.

It is an arithmetic number, because the mean of its divisors is an integer number (853716843).

Almost surely, 2^2845722805 is an apocalyptic number.

It is an amenable number.

2845722805 is a deficient number, since it is larger than the sum of its proper divisors (569144567).

2845722805 is an equidigital number, since it uses as much as digits as its factorization.

2845722805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569144566.

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 2845722805 is about 53345.3166173002. The cubic root of 2845722805 is about 1417.0903199531.

The spelling of 2845722805 in words is "two billion, eight hundred forty-five million, seven hundred twenty-two thousand, eight hundred five".