2805825641 has 6 divisors (see below), whose sum is σ = 2845906026. Its totient is φ = 2766302000.

The previous prime is 2805825613. The next prime is 2805825647. The reversal of 2805825641 is 1465285082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2649675625 + 156150016 = 51475^2 + 12496^2 .

It is not a de Polignac number, because 2805825641 - 2²² = 2801631337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805825647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273260 + ... + 283341.

It is an arithmetic number, because the mean of its divisors is an integer number (474317671).

Almost surely, 2^2805825641 is an apocalyptic number.

It is an amenable number.

2805825641 is a deficient number, since it is larger than the sum of its proper divisors (40080385).

2805825641 is an frugal number, since it uses more digits than its factorization.

2805825641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556743 (or 556672 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 2805825641 is about 52970.0447517274. The cubic root of 2805825641 is about 1410.4365700429.

The spelling of 2805825641 in words is "two billion, eight hundred five million, eight hundred twenty-five thousand, six hundred forty-one".