3995779804805 has 8 divisors (see below), whose sum is σ = 4794994347000. Its totient is φ = 3196584789696.

The previous prime is 3995779804801. The next prime is 3995779804831. The reversal of 3995779804805 is 5084089775993.

It can be written as a sum of positive squares in 4 ways, for example, as 1270899984964 + 2724879819841 = 1127342^2 + 1650721^2 .

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 3995779804805 - 2² = 3995779804801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995779804801) 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, 4427750 + ... + 5253239.

It is an arithmetic number, because the mean of its divisors is an integer number (599374293375).

Almost surely, 2^{3995779804805} is an apocalyptic number.

It is an amenable number.

3995779804805 is a deficient number, since it is larger than the sum of its proper divisors (799214542195).

3995779804805 is an equidigital number, since it uses as much as digits as its factorization.

3995779804805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763543.

The product of its (nonzero) digits is 685843200, while the sum is 74.

The spelling of 3995779804805 in words is "three trillion, nine hundred ninety-five billion, seven hundred seventy-nine million, eight hundred four thousand, eight hundred five".